Ebola

3.2.8 Cryptoprocessors and Secure Enclaves

Anatomy and Physiology Chapter 5 Etymological Breakdown of the Term Integumentar y System: • Integument-: Derived from the Latin root integumentum, which means "a covering," "disguise," or "cloak" (stemging from integere, meaning to cover or protect). • -ary: A standard adjectival suffix meaning "pertaining to" or "relating to.” • System: Derived from the Greek systēma, meaning a "organized whole" or a "combination of parts" working together. Put it all together, and the integumentary system literally translates to the system relating to the body's covering (the skin, hair, nails, and associated glands that protect the body as an organized unit). Overview of the Integumentary System The Skin and Beyond: • While commonly called the skin, the integumentary system is actually a complex organ system. • Includes the skin (cutaneous membrane) plus its accessory structures: hair, nails, and sweat and sebaceous (oil) glands. Scale & Importance: • The skin is the largest organ of the body, accounting for about 16 percent of body weight (16 to 20 pounds average adult) and covering a surface area of 1.5 to 2 square meters. Primary Functions: • Acts as the immediate barrier protecting the body from pathogens, chemicals, and mechanical injury. • Prevents fluid loss and regulates body temperature and sensation. Clinical Significance: • Often reflects overall health; changes in color, texture, or integrity can indicate underlying systemic diseases (e.g., cardiovascular, respiratory, or liver conditions). https://www.researchgate.net/ Overview of Skin Layers Dual-Layered Organ: • The skin consists of two main, distinct layers resting on a supportive subcutaneous layer. 1. Epidermis: • The superficial, outermost layer of the skin. • Composed of keratinized stratified squamous epithelium. • Avascular (receives nutrients via diffusion from the dermis below). 2. Dermis: • The deeper layer lying directly beneath the epidermis. • Composed of connective tissue (areolar and dense irregular). • Vascularized; houses blood vessels, lymphatic vessels, nerves, hair follicles, and sweat glands. Overview of Skin Layers 3. Hypodermis (Subcutaneous Layer / Superficial Fascia): • Technically not part of the skin itself, but closely associated. • Composed of loose areolar and adipose tissue; anchors skin to underlying muscle and bone while providing insulation and cushioning. https://quizlet.com/ Thick Skin vs. Thin Skin (Epidermal Layers) Classification Criteria: • Skin is categorized as either "thick" or "thin" based on the number of epidermal layers and the depth of the stratum corneum, not the total thickness of the skin organ as a whole. Thin Skin: • Contains four layers (stratum basale, spinosum, granulosum, and corneum). NOTE: These are listed from deep to superficial • Lacks the stratum lucidum. • Covers the vast majority of the body surface and contains hair follicles and sebaceous glands. Thick Skin: • Contains five layers (features the translucent stratum lucidum). • Found only on areas subject to heavy friction and abrasion: the palms of the hands and the soles of the feet. • Features a much thicker stratum corneum and lacks hair follicles and sebaceous glands. https://med.libretexts.org/ Cells of the Epidermis 1. Keratinocytes: • The most abundant cells in the epidermis (approx. 90%). • Synthesize keratin, a tough, fibrous protein that gives skin its hardness, durability, and water-resistant properties. • Continuously produced by stem cells in the deepest layer, pushing upward and eventually shedding. 2. Melanocytes: • Located in the deepest epidermal layer. • Produce the pigment melanin, which absorbs UV radiation and protects deeper cell DNA; transferred to keratinocytes. 3. Langerhans Cells: • Dendritic cells functioning as macrophages in the epidermis. • Engulf bacteria, foreign particles, and damaged cells to trigger an immune response. 4. Merkel Cells: • Receptor cells located in the deepest layer that function as touch receptors, associating with sensory nerve endings. Cells of the Epidermis Layers (Strata) of the Epidermis Layers (Strata) of the Epidermis 1. Stratum Basale (Basal Layer / Stratum Germinativum): • Deepest single layer; attached to the basement membrane and underlying dermis. • Forms a wavy boundary by interlocking with upward projections of the dermis called dermal papillae, increasing surface area and strengthening the epidermal-dermal bond to prevent shearing (enhancing grip). • The stratum basale is a single layer of cells primarily made of basal cells. • Site of continuous mitotic cell division (cuboidal stem cells) that continually produce new keratinocytes. • Houses melanocytes (pigment producers) and Merkel cells (touch receptors). 2. Stratum Spinosum ("Spiny Layer"): • 8 to 10 layers of keratinocytes connected by strong desmosomes, giving a spiny appearance under a microscope. • Contains maturing keratinocytes and Langerhans cells. • Keratinocytes in the stratum spinosum begin the synthesis of keratin and release a water-repelling glycolipid. https://www.flickr.com/photos/187096960@N06/51172620298 Layers (Strata) of the Epidermis 1. Stratum Basale (Basal Layer / Stratum Germinativum): • Deepest single layer; attached to the basement membrane and underlying dermis. • Forms a wavy boundary by interlocking with upward projections of the dermis called dermal papillae, increasing surface area and strengthening the epidermal-dermal bond to prevent shearing (enhancing grip). • The stratum basale is a single layer of cells primarily made of basal cells. • Site of continuous mitotic cell division (cuboidal stem cells) that continually produce new keratinocytes. • Houses melanocytes (pigment producers) and Merkel cells (touch receptors). 2. Stratum Spinosum ("Spiny Layer"): • 8 to 10 layers of keratinocytes connected by strong desmosomes, giving a spiny appearance under a microscope. • Contains maturing keratinocytes and Langerhans cells. • Keratinocytes in the stratum spinosum begin the synthesis of keratin and release a water-repelling glycolipid. https://www.flickr.com/photos/187096960@N06/51172620298 Layers (Strata) of the Epidermis 3. Stratum Granulosum ("Granular Layer"): • 3–5 layers deep; cells flatten and fill with keratin, keratohyalin granules, and lamellar granules (waterproofing glycolipids). • Organelles disintegrate and cell death occurs as cells are pushed further from the blood supply. 4. Stratum Lucidum ("Clear Layer"): • Thin, translucent layer of dead, flattened cells packed with eleidin. • Found only in thick skin (palms of hands and soles of feet). 5. Stratum Corneum ("Horny Layer"): • Superficial layer consisting of 15–30 layers of flat, dead, keratin-filled cells. • Provides a durable, waterproof barrier against microbes, dehydration, and mechanical abrasion; continuously sloughed off. Layers (Strata) of the Epidermis The Dermis: Regions & Structure General Characteristics: • The "core" of the cutaneous system; houses blood vessels, sweat glands, oil glands, hair follicles, and nerve endings. • Consists of two layers of connective tissue that compose an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts. 1. Papillary Layer: • Upper 20% of the dermis; composed of loose areolar connective tissue with a loose meshwork of collagen and elastic fibers. • Features dermal papillae that project upward into the epidermis, forming unique epidermal ridges (fingerprints) that enhance grip. • Contains rich capillary loops that nourish the avascular epidermis via diffusion and help regulate body temperature and lymphatic capillaries. • Packed with sensory nerve endings, including Meissner corpuscles (receptors sensitive to light touch) and free nerve endings that detect pain and temperature. • 2. Reticular Layer: • Deeper, thicker 80% of the dermis; composed of dense irregular connective tissue. • Packed with thick bundles of collagen fibers (for structural strength and tensile resilience) and elastic fibers (for skin stretch and recoil). • Contains larger blood vessels, sweat/sebaceous glands, and Pacinian corpuscles (deep pressure receptors). Papillary layer also contains fibroblasts, some fat cells (adipocytes), and phagocytes. Meissner corpuscles https://neuroscientificallychallenged.com/glossary/meissners-corpuscles https://histology.siu.edu/intro/Meissners2.htm The Dermis: Regions & Structure • Papillary layer also contains fibroblasts, some fat cells (adipocytes), mast cells, and phagocytes. https://www.enhance-me-training.com/topic/the-dermis/ The Hypodermis (Subcutaneo us Layer) Position & Anatomy: • Located directly beneath the reticular layer of the dermis. • Technically not part of the skin proper, but rather a connective tissue layer that anchors the skin to underlying bone and muscle. • Composed primarily of loose areolar connective tissue and adipose tissue (fat cells). Vascular Supply: • Highly vascularized; contains large blood vessels that supply the skin and serve as a common site for subcutaneous injections (hypodermic needles). Primary Functions: • Energy Storage: Adipocytes store triglycerides as an energy reserve. • Insulation & Protection: The fat layer provides thermal insulation against heat loss and acts as a shock-absorbing cushion to protect underlying structures from mechanical trauma. Skin Pigmentation & Color Determinants 1. Melanin: • Produced by melanocytes; primary pigment determining skin color. • Exists in two primary forms: eumelanin (brown/black) and pheomelanin (red/yellow). • UV exposure stimulates tyrosinase enzyme activity, increasing melanin production (tanning) to shield cell nuclei from DNA damage. • Freckles and moles represent localized accumulations of melanin. 2. Carotene: • A yellow-orange pigment obtained from plant-based foods (e.g., carrots, sweet potatoes) that can accumulate in the stratum corneum and hypodermis. 3. Hemoglobin: • The red oxygen-transporting protein in red blood cells. • Imparts a pinkish or red tint to the skin as blood flows through the dermal capillaries, particularly visible in lighter-skinned individuals when oxygenated. Carotenodermia https://www.nejm.org/doi/abs/10.1056/NEJMicm950425 https://en.wikipedia.org/wiki/Jaundice https://www.azolifesciences.com/ Integumentary System Disorders Overview of Accessory Structures Definition: • Structures that originate from the epidermis and extend down into the dermis or hypodermis. Key Components: • Hair • Nails • Sweat (Sudoriferous) Glands • Sebaceous (Oil) Glands General Function: • While embedded in the skin, these structures play critical roles in protection, sensory input, thermoregulation, and excretion. https://www.mayoclinichealthsystem.org/ https://www.harleystreethairtransplants.org/ Hair Structure and Growth Anatomy of a Hair: • Shaft: The portion of the hair exposed above the skin surface (completely dead, keratinized cells). • Root: The portion of hair anchored within the follicle below the skin surface. • Hair Bulb: The expanded base of the root surrounding the hair papilla (which contains blood vessels and nerves). Layers of the Hair: • Medulla: The central core of the hair. • Cortex: The middle layer providing strength and pigment. • Cuticle: The outermost layer of overlapping, single cells protecting the inner layers. Follicle & Arrector Pili: • Surrounded by a root sheath and connected to an involuntary smooth muscle called the arrector pili, which contracts to pull hair upright ("goosebumps" in response to cold or fear) and is controlled by the sympathetic nervous system. • This traps a layer of air to add insulation https://www.toppik.com/ Internal Root Sheath Layers of the Hair Follicle External Root Sheath • Structure: Surrounds the growing hair root up to the hair shaft. • Origin: Derived from the basal cells of the hair matrix. Wall • Structure: Encloses the hair root as a direct extension of the epidermis. • Characteristics: Composed of basal cells at the base; becomes increasingly keratinous toward the upper regions. Glassy Membrane • Structure: A thick, clear connective tissue sheath covering the hair root. • Function: Connects the hair follicle directly to the surrounding dermal tissue. Root Hair Plexuses (Hair Follicle Receptors) • Histological Definition: Specialized networks of unmyelinated sensory nerve fibers that wrap intricately around and entwine within the external root sheath of hair follicles. • Anatomical Position: Located in the dermal portion of the hair follicle wall, typically positioned just inferior to the entrance of the sebaceous gland ducts. • Functional Role: Act as rapid-adapting mechanoreceptors (tactile receptors) responsible for detecting fine, light-touch stimuli. • Mechanism of Action: • Deflection of the hair shaft (from wind, clothing, or a crawling insect) acts as a mechanical lever. • Movement physically shifts the follicular wall and deforms the entwined nerve endings. • Mechanical deformation opens mechanically- gated ion channels, triggering action potentials that travel via sensory neurons to the central nervous system. • Clinical/Physiological Significance: Highly sensitive to initial directional movement, providing early cutaneous awareness of external environmental contact before deeper touch receptors are engaged. https://quizlet.com/ca/443370620/hair-and-nails-flash-cards/ https://www.nisenet.org/catalog/scientific-image-human-hair Hair Growth Cycle & Dynamics • Anagen Phase (Growth): Rapid cell division at the root pushes the hair shaft upward at ~0.3 mm/day; lasts 2 to 7 years. • Catagen Phase (Transition): A brief 2 to 3 week transitional period marking the end of active follicular growth. • Telogen Phase (Resting): Lasts 2 to 4 months with no new growth, culminating in a new anagen phase that sheds the old hair. • Shedding & Loss: Average daily loss is 50 hairs; excessive loss exceeding replacement results from aging, hormonal fluctuations, or dietary changes. https://www.pinterest.com/pin/halloween-hair--417638565445540250/ Sweat (Sudoriferous) Glands Function: • Produce sweat to cool the body via evaporative cooling and excrete metabolic wastes. 1. Eccrine (Merocrine) Sweat Glands: • More common; distributed across nearly the entire skin surface (especially palms, soles, and forehead). • Produce a hypotonic fluid (water, salts, metabolic wastes) released via exocytosis directly onto the skin surface for thermoregulation. 2. Apocrine Sweat Glands: • Confined to areas with hair follicles (e.g., armpits and genital regions). • Larger glands that release a thicker, organic-rich (in addition to water and salts) secretion into hair follicles, which is metabolized by bacteria to produce body odor; become active starting at puberty. • The release of this sweat is under both nervous and hormonal control https://en.wikipedia.org/wiki/Apocrine_sweat_gland Sebaceous (Oil) Glands Definition: • Exocrine glands associated with hair follicles found all over the body except on the palms and soles. Secretion (Sebum): • Produce sebum, a mixture of lipids, cholesterol, and proteins. Functions of Sebum: • Lubricates and waterproofs the skin and hair, preventing them from drying out. • Possesses antibacterial properties to inhibit the growth of microorganisms on the skin surface. Mode of Secretion: • Holocrine secretion: cells accumulate sebum until they rupture and destroy themselves, releasing their product (replaced by mitotic division of basal cells). https://quizlet.com/ca/443370620/hair-and-nails-flash-cards/ Nails Structure & Composition: • Specialized accessory structures composed of densely packed, dead, heavily keratinized epidermal cells. Key Anatomical Features: • Nail Body (Plate): The visible hard plate covering the dorsal surface of the fingertip/toe. • Nail Bed: The specialized skin underlying the nail body, richly supplied with blood vessels (giving it a pink color). • Nail Root: The deep epidermal fold under the skin where nail production begins. • Eponychium (Cuticle): The fold of epithelial tissue that overlaps the proximal edge of the nail body. • Lunula: The thick, crescent-shaped whitish area at the base of the nail body overlying the thick nail matrix. Primary Functions: • Protects the distal tips of fingers and toes from trauma and enhances precision grip for picking up small objects. Overview of Integumentary Functions Primary Role: • The skin and its accessory structures function as an integrated organ system that maintains homeostasis and protects the body. Core Physiological Functions: • Protection: Acts as a physical and chemical barrier against external elements. • Sensation: Detects environmental stimuli via specialized receptors. • Thermoregulation: Modulates body temperature through sweat and blood vessel adjustments. • Vitamin D Synthesis: Produces a crucial hormone essential for calcium absorption. Protection (The Body's Armor) Physical & Chemical Barrier: • Protects underlying vital organs from mechanical injury, UV radiation, wind, and water. Dehydration Prevention: • Layers of tough keratin and water-resistant glycolipids in the stratum corneum prevent excessive fluid loss. Microbial Defense: • Acts as a first line of defense against pathogens, abrasive grit, and harmful chemicals. • Sweat contains dermcidin, which possesses antibiotic properties to deter microbe over-colonization. Immune Protection: • Langerhans (dendritic) cells patrol epidermal layers to intercept foreign invaders and trigger immune responses. https://uen.pressbooks.pub/anatomyphysiology/chapter/epidermis/ Langerhan s (Dendritic) Cells (APC’s) https://courses.lumenlearning.com/wm-biology2/chapter/antigen-presenting-cells/ Sensation (Sensory Function) Environmental Awareness: • The integumentary system contains a rich network of specialized nerve endings and receptors across the epidermis, dermis, and hypodermis. Key Sensory Receptors: • Meissner (Tactile) Corpuscles: Highly concentrated in fingertips; respond to light touch. • Pacinian (Lamellated) Corpuscles: Detect deep pressure and vibration. • Merkel Cells & Hair Root Plexuses: Detect fine touch and minor hair disturbances (e.g., sensing an insect crawling on the skin). Pain & Temperature: • Free nerve endings distributed throughout the skin monitor noxious stimuli, temperature shifts, and physical trauma. Sensation (Sensory Function) • Merkel cells (Tactile discs): Located in the deep layer of the epidermis (stratum basale), these are slow-adapting receptors that excel at detecting sustained touch, fine detail, texture, and edges. When pressed, they release signaling molecules that excite adjacent nerve endings, providing high-resolution tactile feedback (like reading Braille or feeling a smooth surface). • Meissner corpuscles (Tactile corpuscles): Situated in the dermal papillae of hairless (glabrous) skin, such as your fingertips and lips, these are rapid-adapting receptors. They fire intensely when skin first makes contact with an object and when it loses contact, making them exceptionally sensitive to light touch, low-frequency vibration, and slippage (helping you adjust your grip on a moving object). • Pacinian corpuscles (Lamellar corpuscles): Found deep in the dermis and subcutaneous layer, these large, onion-shaped receptors are rapidly adapting and exquisitely sensitive to deep pressure and high-frequency vibration. Because of their layered capsule, steady pressure is filtered out, allowing them to fire only when vibration or sudden mechanical shifts occur (such as feeling a drill vibrate or walking on a rough surface). • Hair root plexus (Hair follicle receptors): A web of sensory nerve fibers wrapped around the base of hair follicles. These rapid-adapting mechanoreceptors detect the bending or movement of hairs. Even a light breeze or an insect crawling across your arm displaces a hair, triggering the surrounding nerve plexus and providing an early warning system for tactile movement across hairy skin. Pacinian Corpuscle (Sensory Organ) Pacinian Corpuscle Anatomy: Encapsulated, onion-like mechanoreceptor for deep pressure and vibration. • The Capsule & Outer Lamination: Dense connective tissue outer envelope and flattened lamellar cells that filter out steady pressure. • Viscous Gel: Interstitial fluid between layers that shifts hydraulically to dampen sustained forces, driving rapid adaptation. • Inner Lamination: Tightly packed, specialized modified Schwann cells forming a core around the central nerve terminal. • Terminal Non-Myelinated Axon: Bare, uninsulated nerve tip at the center with stretch-sensitive channels that trigger action potentials when compressed. • Myelinated Axon: Insulated nerve fiber exiting the corpuscle to rapidly transmit electrical impulses toward the central nervous system via saltatory conduction. Thermoregulation Sympathetic Nervous System Control : The integumentary system works closely with the autonomic nervous system (involuntary bodily control) to continuously monitor and adjust core body temperature. Response to Overheating (Cooling): • Sweating: Eccrine sweat glands secrete water and electrolytes; evaporative cooling dissipates body heat. (Note: insensible perspiration secretes ~500 mL/day even without noticeable sweating). • Vasodilation: Dermal blood vessels dilate to bring warm blood closer to the body surface, releasing heat into the environment. Response to Cold (Heat Retention): • Vasoconstriction: Dermal arterioles constrict to minimize blood flow to the skin surface, trapping core heat internally (can cause a pale/whitish hue). • Shivering: Involuntary muscle contractions generate metabolic heat (assisted by the contraction of arrector pili muscles). Vitamin D Synthesis The Pathway: • 1. Skin Activation: When epidermal cells are exposed to ultraviolet (UV) radiation, a cholesterol derivative in the skin converts into cholecalciferol (Vitamin 3). • 2. Liver Processing: The liver converts cholecalciferol into an intermediate compound called calcidiol. • 3. Kidney Activation: The kidneys convert calcidiol into calcitriol, which is the active, functional hormone form of Vitamin D. Physiological Importance: • Calcitriol is essential for the normal intestinal absorption of calcium and phosphorus, which are strictly required for bone health, growth, and remodeling. https://www.researchgate.net/ Effects of Aging on the Integumentary System Epidermal & Dermal Changes: • Mitotic activity in the stratum basale slows down, causing the epidermis to thin. • The dermis exhibits a reduced ability to regenerate, leading to a loss of structural elasticity and flexibility (manifesting as wrinkles). • Fibroblast activity declines, resulting in decreased production of collagen and elastic fibers. Vascular & Glandular Decline: • Blood supply to the skin decreases, reducing the skin's capacity to heal quickly and impairing thermoregulation (leading to increased sensitivity to cold). • Functional activity of sweat (sudoriferous) and sebaceous (oil) glands drops, causing dry, scaly skin and a reduced ability to sweat effectively. Subcutaneous & Accessory Alterations: • The hypodermis loses fat storage over time, contributing to a loss of padding, insulation, and a sunken appearance. • Melanocyte and hair follicle activity slows down, resulting in graying or thinning hair and a reduced capacity to protect against UV radiation. • Immune responsiveness declines as the number of Langerhans cells drops, increasing susceptibility to skin infections and damage. Overview of Skin Cancer Definition & Cause: • Cancer caused by abnormal, uncontrollable cell division in the skin. • Primary culprit is overexposure to ultraviolet (UV) radiation from the sun or tanning beds, which damages cellular DNA. The Danger of Metastasis: • Metastasis is the process where cancer cells break away from the primary tumor, enter the bloodstream or lymphatic vessels, and spread to secondary sites (such as lymph nodes, lungs, or liver), making treatment significantly more difficult. Types of Skin Cancer: • Basal Cell Carcinoma (BCC): Starts in the stratum basale and spreads along that boundary; the most common form of skin cancer, highly curable with early treatment (common in areas exposed to the sun). • Treatments include surgery, freezing (cryosurgery), and topical ointments • Squamous Cell Carcinoma (SCC): Affects keratinocytes of the stratum spinosum; presents as lesions on the scalp, ears, and hands; more aggressive than BCC and can metastasize if left untreated. • Surgery and radiation are used to cure SCC • Melanoma: Uncontrolled growth of melanocytes, typically developing from a mole; the most fatal form of skin cancer due to high rates of metastasis. • Treatment typically involves surgical excision and immunotherapy Basal Cell Carcinoma Squamous Cell Carcinoma Melanoma Early Detection of Melanoma (The ABCDE Rule) Clinical Screening Guidelines: • A – Asymmetry: The two sides of the mole or lesion do not match. • B – Borders: The edges are irregular, ragged, notched, or blurred. • C – Color: The color is not uniform and may include different shades of brown or black, or patches of pink, red, white, or blue. • D – Diameter: The lesion is larger than 6 mm (about the size of a pencil eraser), though melanomas can sometimes be smaller. • E – Evolving: The mole is changing in size, shape, color, or elevation, or begins to bleed/itch. Common Skin Disorder s Introduction to Skin Disorders: • Skin disorders range from minor localized irritations to chronic systemic conditions, often involving inflammation, immune responses, or blocked glands. • Disorders include psoriasis, cold sores, impetigo, scabies, hives, and warts. Eczema: • An inflammatory, allergic condition that presents as dry, red, itchy patches resembling rashes. • Often accompanied by swelling, flaking, and skin cracking; managed with moisturizers, corticosteroid creams, and immunosuppressants. Acne: • A skin disturbance involving the overproduction of sebum and keratin that blocks hair follicles. • Most common during puberty due to hormonal surges (androgens) that stimulate sebaceous glands, leading to bacterial infection and inflammation. Skin Injuries & The Healing Process Types of Injuries: • Cuts, punctures, scrapes, and burns caused by physical trauma, heat, chemicals, or electricity. • Step-by-Step Wound Healing Stages: 1. Hemostasis & Clotting: A blood clot forms immediately to stop bleeding and eventually dries into a protective scab. 2. Inflammation: White blood cells (macrophages) clear out debris and fight potential infection. 3. Proliferation: Fibroblasts migrate into the wound bed to produce new collagen and blood vessels (granulation tissue). 4. Remodeling & Scarring: Epithelial cells regenerate across the wound under the scab, while scar tissue (dense collagen) replaces normal tissue depending on the depth of the injury. https://www.shieldhealthcare.com/ https://jetem.org/thermal_burns/ Burns and Classification s Nature of Burns: • Caused by intense heat, radiation, electricity, or chemicals, resulting in massive cell death and fluid loss. Severity Classifications: • First-Degree (Superficial): Affects only the epidermis; results in redness and minor pain (e.g., mild sunburn) that heals within days. • Second-Degree (Partial-Thickness): Damages both the epidermis and upper dermis; results in blistering and significant pain. • Third-Degree (Full-Thickness): Destroys the full thickness of the skin (epidermis and dermis), charring tissue and destroying nerve endings (often requiring skin grafts). • Fourth-Degree (Full-Thickness with Deep Tissue Damage): Extends completely through the skin down to underlying muscle, tendons, and bone; requires extensive surgical intervention and often amputation. Major Systemic Risks: • Severe dehydration, electrolyte imbalance, renal/circulatory failure, and rampant secondary infections due to lost skin barrier function. Fourth degree Burn https://burncenters.com/burns/evaluate-a-burn/ Common Integumentary Abnormalities and Injury Responses Scars & Keloids: • Scars: Formed when the skin repairs deep dermal damage using collagen-rich connective tissue rather than regenerating normal tissue. • Lacks accessory structures (e.g., hair follicles, sweat glands, and sebaceous glands) • Keloids: Result from an overproduction of scar tissue (collagen) that extends beyond the original boundaries of the wound. Bedsores (Decubitus Ulcers): • Caused by constant, long-term pressure on bony areas that cuts off blood supply to the skin, leading to tissue necrosis and breakdown. Stretch Marks (Striae): • Occur when the dermis is stretched beyond its elastic limits (e.g., during rapid growth, weight gain, or pregnancy), causing collagen and elastin fibers to tear. Calluses & Corns: • A protective response where the stratum basale increases mitotic activity in areas subjected to constant friction or pressure, resulting in a thickened, hardened layer of dead cells. https://www.healthline.com/health/keloid-ear https://www.mayoclinic.org/diseases-conditions/corns-and- calluses/multimedia/callus/img-20007285 https://myexpertmidwife.com/blogs/my-expert-midwife/stretch-marks-101 https://blog.xoxoday.com/empuls/get-to-know-you-questions-for-coworkers/

enclave/ exclave

1. Exploration & Native Americans Christopher Columbus Italian explorer who sailed for Spain in 1492. Wanted to find a western route to Asia. Reached the Caribbean instead. His voyages began sustained European contact with the Americas. Led to European colonization and the Columbian Exchange. Conquistadores Spanish explorers/conquerors who sought gold, land, and converts. Helped Spain conquer large Native American empires. Often used military force and alliances with rival Native groups. Mayas, Incas, Aztecs Major civilizations in the Americas before European conquest. Aztecs: centered in Mexico; conquered by Cortés. Incas: centered in the Andes/South America; conquered by Pizarro. Mayas: Central America; famous for cities, writing, mathematics, and astronomy. Hernando Cortés Spanish conquistador. Conquered the Aztec Empire in 1519–1521. Defeated Montezuma/Moctezuma II and captured Tenochtitlán. Francisco Pizarro Spanish conquistador who conquered the Inca Empire. Operated in present-day Peru. Montezuma Aztec ruler when Cortés arrived. Also called Moctezuma II. His empire was eventually conquered by Cortés and his allies. Hernando de Soto Spanish explorer who explored the southeastern part of what became the United States. His expedition encountered Native peoples and reached the Mississippi River. Francisco de Coronado Spanish explorer who explored the American Southwest and Great Plains. Searched for the legendary Seven Cities of Gold. Jacques Cartier French explorer who explored the St. Lawrence River. His voyages helped France establish claims in North America. John Cabot Italian explorer sailing for England. Explored the North Atlantic coast of North America in 1497. Helped England establish a claim to North American territory. Prince Henry the Navigator Portuguese prince who supported exploration. Helped Portugal develop navigation and sailing technology. Portuguese exploration contributed to the development of the Atlantic slave trade. ⸻ 2. Spanish, French & English Colonization Joint-stock company A company where investors pool money to fund a business. Why important: English colonies such as Virginia were partly financed through joint-stock companies. Virginia Company English joint-stock company. Founded Jamestown in 1607. Investors hoped to make money from the colony. Jamestown First permanent English settlement in North America, 1607. Located in Virginia. Suffered from disease, starvation, conflict, and poor leadership. Tobacco eventually helped make the colony profitable. Tidewater Coastal area of Virginia and surrounding colonies. Early English settlements were concentrated here. Piedmont Inland region between the Tidewater/coastal plain and Appalachian Mountains. Settlement expanded into this area as colonies grew. Coureurs de bois French “runners of the woods.” French colonists/traders who lived and traveled among Native Americans. Participated heavily in the fur trade. Samuel de Champlain French explorer. Founded Quebec in 1608. Known as the “Father of New France.” Developed alliances with Native Americans. ⸻ 3. Roanoke & Early Virginia Sir Walter Raleigh English supporter of colonization. Sponsored the attempted settlement at Roanoke. Roanoke English colony established in the 1580s. Eventually disappeared. Called the “Lost Colony.” John Smith Leader at Jamestown. Helped organize the settlement and enforce discipline. Famous for his relationship with Pocahontas, although later accounts are disputed. “Starving Time” Winter of 1609–1610 at Jamestown. Colonists experienced extreme hunger, disease, and death. Demonstrated how difficult early colonization was. John Rolfe Helped make Virginia economically successful by growing tobacco. Married Pocahontas. Tobacco became Virginia’s major cash crop. Headright system Colonists received land for bringing people to Virginia. Encouraged immigration. Helped create large plantations and contributed to social/economic inequality. Freeman A colonist who possessed certain political rights, including the ability to participate in government. Political rights were generally limited to certain white male colonists. House of Burgesses Created in Virginia in 1619. First representative legislative assembly in the English colonies. Important development in colonial self-government. 1618 reforms of the Virginia Company The Virginia Company changed its policies to attract settlers and make Virginia successful. Included: More representative government. Greater incentives for settlers. Expansion of land ownership. Greater economic opportunity. Result: Virginia became more attractive to settlers. ⸻ 4. Puritans & Religion John Calvin Protestant religious thinker. Developed Calvinism. Believed in predestination. Predestination The belief that God has already determined who will be saved. Puritanism Protestant movement that wanted to reform the Church of England. Puritans believed the English church still contained too many Catholic practices. Separatists Puritans who believed the Church of England could not be reformed. Wanted to separate completely from it. The Pilgrims were Separatists. Non-Separatist Puritans Wanted to reform the Church of England rather than leave it completely. Many settled Massachusetts Bay. Pilgrims Separatist Puritans. Settled at Plymouth in 1620. Signed the Mayflower Compact. Mayflower Compact Agreement signed by Plymouth settlers. Established self-government based on majority rule. Important early example of colonial self-government. Plymouth Colony founded by Pilgrims in 1620. Later became part of Massachusetts. William Bradford Pilgrim leader and governor of Plymouth. Helped maintain the colony. Wrote about Plymouth’s early history. Massachusetts Bay Colony Founded by Puritans in 1630. Much larger than Plymouth. Centered around Boston. Governed according to Puritan religious beliefs. John Winthrop Governor of Massachusetts Bay. Described Massachusetts as a “city upon a hill.” “City upon a hill” Winthrop’s idea that Massachusetts should serve as an example of a successful Christian society to the world. Covenant A religious agreement between God and a community. Puritans believed their communities had a special covenant with God. “Visible saints” Puritans who demonstrated that they had received God’s grace and were considered members of the church. “Invisible saints” Those believed to have God’s grace/salvation, even though humans could not truly know who was saved. “Saving grace” The belief that God’s grace could lead a person to salvation. ⸻ 5. New England Religious Conflicts Anne Hutchinson Puritan woman who challenged Massachusetts religious leaders. Believed faith/grace was more important than following religious rules. Put on trial and banished from Massachusetts. Shows the limits of religious tolerance in Massachusetts. Roger Williams Founded Rhode Island. Believed in: Religious freedom Separation of church and government Fairer treatment of Native Americans Banished from Massachusetts. Fundamental Orders of Connecticut 1639. Established a representative government in Connecticut. Often considered one of the first written constitutions in America. King Philip’s War 1675–1676. Major conflict between New England colonists and Native Americans led by Metacom, whom colonists called King Philip. Resulted in enormous destruction and loss of Native American land and power. Toleration Act of 1649 Maryland law granting religious toleration to Christians. Intended especially to protect Catholics. Important early example of religious toleration, although it was limited. ⸻ 6. Massachusetts Education Massachusetts Education Act of 1647 Required towns to establish schools when they reached certain population sizes. Why? Puritans wanted people to be able to read the Bible. Important: Shows how strongly education and religion were connected in Puritan society. ⸻ 7. Colonial Regions New England Colonies Examples: Massachusetts Plymouth Connecticut Rhode Island New Hampshire Important characteristics Religious motivations Puritan influence Small farms Town-centered communities Fishing Shipbuilding Lumber Commerce Less suitable climate for large cash-crop plantations ⸻ Middle Colonies Examples: New York Pennsylvania New Jersey Delaware Important characteristics Religious diversity More ethnic diversity Fertile farmland Grain production Large ports Trade Cities such as New York and Philadelphia ⸻ Southern Colonies Examples: Virginia Maryland North Carolina South Carolina Georgia Important characteristics Plantation agriculture Tobacco, rice, indigo Slavery Large landowners Warm climate Greater social/economic inequality ⸻ 8. Types of Colonies Corporate colony Colony controlled by a company. Example: Virginia originally operated under the Virginia Company. Royal colony Controlled directly by the English king. Governor appointed by the king. Proprietary colony Granted by the king to an individual or group. Proprietor had significant control. Example: Pennsylvania → William Penn Charter of Liberties Early New York document providing certain rights and outlining representative government. Associated with efforts to establish political participation in the colony. ⸻ 9. William Penn & Quakers William Penn Quaker. Founded Pennsylvania. Wanted a colony based on religious tolerance. Had relatively peaceful relationships with Native Americans. Quakers / Society of Friends Protestant religious group. Believed in spiritual equality. Rejected many traditional church structures. Supported religious tolerance. Women had greater religious participation than in many other colonial communities. George Calvert Also known as Lord Baltimore. Catholic Englishman. Received land that became Maryland. Wanted a place where Catholics could practice their religion more freely. ⸻ 10. Georgia James Oglethorpe Founded Georgia in 1732. Intended Georgia partly as a buffer against Spanish Florida. Also wanted to create opportunities for poor English people. ⸻ 11. Pennsylvania & New York Patroonship Dutch system in New Netherland. Large land grants were given to wealthy individuals called patroons. Encouraged large estates. Quitrent A fee/rent paid to a proprietor for use of land. Common in proprietary colonies. ⸻ 12. Bacon’s Rebellion Bacon’s Rebellion 1676 Virginia. Nathaniel Bacon led settlers against Native Americans and Virginia’s government. Bacon’s followers believed Governor Berkeley was not protecting frontier settlers. Why important? Exposed class tensions between wealthy planters and poorer colonists. Afterward, Virginia increasingly relied on enslaved Africans instead of indentured servants. ⸻ 13. Colonial Social Classes Indentured servants Europeans who agreed to work for a certain number of years in exchange for passage to America. After their contract ended, they could become free. Freedom dues Things given to indentured servants when their contract ended. Could include: Clothing Tools Land or supplies Redemptioners European immigrants who agreed to work for a period of time after arriving in America to pay off transportation costs. ⸻ 14. Slavery Chattel slavery System in which enslaved people were treated legally as property. Slavery became hereditary. Enslaved people had extremely limited/no legal freedom. Middle Passage Forced voyage of enslaved Africans across the Atlantic to the Americas. Part of the triangular trade. Conditions were extremely overcrowded and deadly. Slave codes Laws restricting the rights and freedoms of enslaved people. They often: Prevented movement. Restricted education. Restricted assembly. Defined enslaved people as property. Made slavery hereditary. ⸻ 15. Stono Rebellion Stono Rebellion 1739, South Carolina. Enslaved Africans rebelled and attempted to escape toward Spanish Florida. Colonial authorities eventually suppressed the rebellion. Why important? Led to even stricter slave laws. ⸻ 16. Triangular Trade A trading system connecting Europe, Africa, and the Americas. Simplified: Europe → Africa Manufactured goods Africa → Americas Enslaved Africans Americas → Europe Sugar Tobacco Rice Other raw materials ⸻ 17. Mercantilism Economic theory used by European empires. Basic idea: Colonies exist to benefit the mother country. England wanted colonies to: Supply raw materials. Buy English manufactured goods. Increase England’s wealth. Strengthen England’s economy. ⸻ 18. Navigation Acts English laws regulating colonial trade. They required much colonial trade to: Use English ships. Pass through English-controlled channels. Benefit England. Goal: strengthen mercantilism. ⸻ 19. Molasses Act 1733 Taxed foreign molasses imported into British colonies. Designed to protect British sugar producers in the Caribbean. Colonists often avoided or resisted the tax through smuggling. Woolens Act Restricted colonial production/trade of woolen goods. Intended to protect English manufacturers. Hat Act Restricted colonial production/export of hats. Another example of Britain controlling colonial manufacturing. Iron Act Encouraged production of certain raw iron products in the colonies but restricted production of finished iron goods. Britain wanted colonies to supply raw materials while buying manufactured products from Britain. BIG IDEA: These laws show mercantilism and British attempts to control colonial economies. ⸻ 20. Dominion of New England Dominion of New England Created by King James II in 1686. Combined several New England colonies under one government. Why? Increase royal control. Enforce Navigation Acts. Reduce colonial self-government. Sir Edmund Andros Royal governor of the Dominion of New England. Strongly enforced royal policies. Very unpopular with many colonists. ⸻ 21. Glorious Revolution Glorious Revolution — 1688 English people and Parliament removed James II. William and Mary became monarchs. Increased the power of Parliament. Colonial effect: Colonists overthrew the Dominion of New England government. Sir Edmund Andros was removed. Colonists regained some self-government. ⸻ 22. Political Deference Political deference The belief that ordinary people should respect and defer to wealthy, powerful, or socially prominent leaders. Colonial society was often hierarchical. ⸻ 23. Lower House of the Legislature The elected part of a colonial legislature representing ordinary property-owning colonists. Examples: House of Burgesses Colonial assemblies Important: These assemblies helped establish the tradition of representative government. ⸻ 24. The Great Awakening Great Awakening Religious revival movement in the 1730s–1740s. Preachers emphasized: Personal faith Emotional religious experiences Salvation Individual relationships with God It challenged established churches and religious authorities. Jonathan Edwards Famous Great Awakening preacher. Known for the sermon: “Sinners in the Hands of an Angry God.” Emphasized God’s power and the need for conversion. George Whitefield Extremely popular traveling preacher. Preached throughout the colonies. Helped spread the Great Awakening. Old Lights People who supported traditional, established religious practices. New Lights People who supported the emotional revival-style religion of the Great Awakening. Baptists Protestant group that grew during the Great Awakening. Emphasized personal faith and baptism. Helped increase religious diversity. ⸻ 25. John Peter Zenger John Peter Zenger New York printer/journalist. Put on trial for criticizing the colonial governor. His lawyer argued that truthful statements should not be considered libel. Why important? His trial became an important symbol associated with freedom of the press. ⸻ 26. Maryland & Carolina Fundamental Constitutions of Carolina Document associated with governing Carolina. Created a hierarchical political/social structure. Helped establish an aristocratic plantation society. Slavery became increasingly important in Carolina. Established churches A government-supported official church. In some colonies, taxes helped support the established church. Important contrast: Established churches = government + religion connected. Rhode Island/Pennsylvania = greater religious freedom. ⸻ 27. Great Migration Great Migration, 1630–1643 Large migration of English Puritans to Massachusetts Bay and other New England colonies. Why? Religious motivations Political/religious conflict in England Desire to build Puritan communities Important: This was different from the much later Great Migration of African Americans during the 20th century. ⸻ 28. Enclosure Movement Enclosure Movement In England, landowners enclosed common lands and combined small fields into larger private farms. Effect: Some small farmers lost access to land. Increased movement of people toward cities and overseas colonies. Helped contribute to English migration to America. ⸻ 29. “City Upon a Hill” vs. Religious Tolerance Know this contrast for APUSH: Massachusetts Bay → Puritan religious society → Limited religious tolerance Rhode Island → Roger Williams → Religious freedom Pennsylvania → William Penn → Quakerism + religious tolerance Maryland → Catholic refuge → Toleration Act of 1649 ⸻ ⭐ The MOST IMPORTANT Connections to Know These are the connections your teacher is likely looking for in APUSH questions. Tobacco → Virginia John Rolfe → tobacco → profitable Virginia → plantations → labor demand → indentured servants → slavery Bacon’s Rebellion → slavery Bacon’s Rebellion → class conflict → elites become more suspicious of poor white workers → increased reliance on African slavery Puritans → Massachusetts Puritans → Great Migration → Massachusetts Bay → John Winthrop → “city upon a hill” Separatists → Plymouth Separatists → Pilgrims → Mayflower → Plymouth → Mayflower Compact Religious disagreement → Rhode Island Anne Hutchinson/Roger Williams → conflict with Massachusetts → Rhode Island → religious freedom Quakers → Pennsylvania William Penn → Quakers → Pennsylvania → religious tolerance Mercantilism → Navigation Acts Mercantilism → Britain wants colonies to benefit England → Navigation Acts → trade restrictions Great Awakening → religious change Great Awakening → emotional religion → New Lights → challenges established churches → increased religious diversity Slavery → plantation economy Cash crops → labor demand → African slavery → slave codes → racial hierarchy

Early English Settlement and Enslavement in the Colonies

Unit 3 Northwest Territory: Location - The region south of the Great Lakes, north and west of the Ohio River, and east of the Mississippi River (modern-day Ohio, Indiana, Illinois, Michigan, and Wisconsin) Settlement expectations - Orderly Grid System: Land was grid-surveyed into square townships (36 square miles) to prevent chaotic land claims. Section 16 of each township was reserved to fund public education. Path to Statehood: Established a 3-stage process for territories to achieve statehood on equal footing with the original 13 states once they reached 60,000 free inhabitants. Civil Liberties & Prohibitions: Guaranteed trial by jury and freedom of religion. Crucially, it banned slavery north of the Ohio River, setting the first federal geographic boundary on the institution. Articles of Confederation: structure of government - A unicameral (one-house) legislature. There was no executive branch (no president to enforce laws) and no national judiciary to settle interstate legal conflicts. importance of Congress - Congress was the sole body of national power. Each state received exactly one vote, meaning small states held equal power to large states Weaknesses - No power to tax: Congress could only request money from states. No power to regulate commerce: Led to interstate tariff wars. Rigid thresholds: Passing major laws required a 9/13 supermajority; amending the Articles required a 13/13 unanimous vote. No standing national army: Left the government defenseless against foreign threats or domestic rebellion. Shay’s Rebellion: Causes - Western Massachusetts farmers (many Revolutionary War veterans) faced heavy state taxes, severe post-war economic depression, and foreclosures on their farms by coastal merchants and courts. Led by Daniel Shays, they shut down debt courts. Outcomes - The weak central government was unable to raise an army to suppress the rebellion; a privately funded state militia finally stopped it. This exposed the profound weaknesses of the Articles of Confederation, spreading fear of "mobocracy" among elites and directly prompting the Constitutional Convention of 1787. Whiskey Rebellion: Causes - Poor western Pennsylvania farmers protested an excise tax on whiskey enacted by Treasury Secretary Alexander Hamilton to pay off national war debts. Whiskey was used as currency and a primary way to market surplus grain. Unique elements - Unlike Shays' Rebellion, President George Washington invoked his new constitutional powers and personally led a massive federalized militia of 13,000 troops to crush the insurrection. Effects - Demonstrating the immense contrast with Shays' Rebellion, it proved that the new federal government under the Constitution possessed the executive power to enforce federal laws and suppress domestic insurrections. It solidified federal authority but alienated westerners, bolstering the nascent Democratic-Republican opposition. Structure of US Government under Constitution – separation of power - Legislative (makes laws), Executive (enforces laws), and Judicial (interprets laws) checks and balances - A system allowing branches to limit the actions of others. Examples: The President can veto congressional legislation; Congress can override a veto or impeach the President; the Senate must approve judicial nominations. Federalism - The constitutional division and sharing of political power between the national (federal) government and the individual state governments. popular sovereignty - The principle that political power resides with the people, who sustain government legitimacy through consent via elected representatives. supremacy clause - Article VI; Establishes that the U.S. Constitution, federal laws, and treaties constitute the "supreme law of the land," overriding conflicting state laws. Issue of slavery: who supported - Southern delegates (e.g., South Carolina, Georgia) fiercely protected slavery as vital to their agrarian, plantation economies. who opposed - Many Northern delegates opposed slavery or its expansion, but prioritized national unity and economic concessions over immediate abolition. position taken by the Founders - The Founders chose pragmatic compromise over moral resolution to keep the Southern states in the Union. They conspicuously avoided using the words "slave" or "slavery" in the text but protected the institution through: Three-Fifths Compromise: Counted 60% of a state’s enslaved population for both congressional representation and federal taxation. Slave Trade Clause: Prohibited Congress from banning the international slave trade for 20 years (until 1808). Fugitive Slave Clause: Required free states to return escaped enslaved laborers to their owners. Concepts debated by Federalist and Anti-Federalists during and after Washington’s presidency; be familiar with people associated with each party Era/Context Federalists Anti-Federalists/Democratic-Republicans Ratification Debate (1787-1788) Supported the Constitution. Wanted a strong central government to maintain order. Written defenses: The Federalist Papers. Opposed the Constitution. Feared a strong central government would mimic British tyranny and squash individual rights. Demanded a Bill of Rights. First Party System (1790s) Federalist Party Democratic-Republican Party Key Leaders Alexander Hamilton, John Adams. Thomas Jefferson, James Madison. Constitutional Interpretation Loose constructionism (broad use of the "elastic/necessary and proper" clause). Strict constructionism (the federal government only has powers explicitly stated in the Constitution). Core Vision Urban, commercial, manufacturing hub; pro-British foreign policy; favored a National Bank. Agrarian republic of independent farmers; pro-French foreign policy; opposed the National Bank. John Adams’ Domestic and Foreign Policy – Naturalization Act, Alien and Sedition Acts, XYZ Affair XYZ Affair (1797): French privateers began seizing American merchant ships. Adams sent diplomats to Paris, where three French agents (dubbed X, Y, and Z) demanded massive bribes before negotiating. This sparked anti-French outrage across America and triggered the Quasi-War, an undeclared naval war. Naturalization Act (1798): Increased the residency requirement for American citizenship from 5 to 14 years. This was designed to target French and Irish immigrants, who heavily voted Democratic-Republican. Alien and Sedition Acts (1798): Alien Act: Authorized the president to deport any non-citizen deemed dangerous to national peace. Sedition Act: Made it a crime to publish "false, scandalous, and malicious writing" against the government or its officials. Adams used it to jail Democratic-Republican newspaper editors. Marbury v. Madison, McCullough v. Maryland Marbury v. Madison (1803): Chief Justice John Marshall ruled that a section of the Judiciary Act of 1789 conflicted with the Constitution. This established the doctrine of Judicial Review, cementing the Supreme Court's power to declare federal laws unconstitutional. McCulloch v. Maryland (1819): Maryland attempted to tax the Second Bank of the United States. The Marshall Court ruled that: The Bank was constitutional via the Implied Powers of the Necessary and Proper Clause. States cannot tax federal institutions ("the power to tax involves the power to destroy"), reaffirming Federal Supremacy. Short Answer: (These are all straight from google overview, just as an fyi) a) Explain the concerns for the nation Washington expressed in his Farewell Address and how they became issues during and immediately following his terms in office. In his 1796 Farewell Address, George Washington explicitly warned the young nation against two main existential threats: the rise of factions (political parties) and entering into permanent foreign alliances. Despite his warnings, both issues immediately fractured the nation during and after his presidency. Domestically, the fierce ideological rift between Alexander Hamilton’s Federalists and Thomas Jefferson’s Democratic-Republicans hardened into America’s first permanent political party system. Externally, the ongoing geopolitical conflict of the French Revolution forced America to take sides. While Washington issued a Neutrality Proclamation in 1793, foreign entanglements escalated under John Adams, whose administration was consumed by the XYZ Affair and the resulting Quasi-War with France. b) Evaluate the issues associated with Adams’ Alien and Sedition Acts. The primary constitutional and political issue of the Alien and Sedition Acts of 1798 was their weaponization for partisan suppression, which directly violated civil liberties. The Sedition Act explicitly restricted freedom of speech and the press by criminalizing criticism of the federal government, drawing widespread condemnation for violating the First Amendment. Furthermore, Federalists utilized these acts to aggressively target their political opponents, arresting Democratic-Republican editors who criticized Adams’ anti-French foreign policies. In response to this perceived federal tyranny, Thomas Jefferson and James Madison anonymously penned the Virginia and Kentucky Resolutions. These documents introduced the radical constitutional theory of nullification, arguing that sovereign states had the right to declare federal laws null and void within their borders, setting a dangerous precedent for future states' rights crises. LEQ – Be able to analyze the 4 areas of concern presented at the Constitutional Convention, including the arguments made by Federalists and Anti-Federalists, as well as the agreements reached that were included in the Constitution. Thesis Statement: Although delegates at the Constitutional Convention of 1787 originally gathered to revise the weak Articles of Confederation, deep regional divides over representation, state power, and economic structure forced intense debates between Federalists and Anti-Federalists. Ultimately, the framework of the new Constitution succeeded because delegates forged pragmatic compromises over congressional representation, executive authority, the preservation of slavery, and federal taxes. Area of Concern 1: Congressional Representation (Large vs. Small States) Debate: Large states favored the Virginia Plan (proportional representation based on population); small states demanded the New Jersey Plan (equal representation per state). Agreement: The Great Compromise (Connecticut Compromise) established a bicameral legislature. The House of Representatives based representation on population, while the Senate granted two seats per state. Area of Concern 2: Counting the Population (Northern vs. Southern States) Debate: Southern states demanded enslaved individuals be counted to boost their legislative seat totals but excluded for federal tax purposes. Northern states argued this was unjust since enslaved populations lacked civil rights. Agreement: The Three-Fifths Compromise dictated that three out of every five enslaved individuals would be counted for both representation and taxation. Area of Concern 3: Executive Branch Power Debate: Anti-Federalists feared a strong executive would morph into a monarchy. Federalists argued a strong executive was vital to enforce laws and avoid the chaos seen in Shays’ Rebellion. Agreement: The creation of a single executive (the President) checked by congressional override powers, impeachment processes, and elected indirectly via the Electoral College. Area of Concern 4: Central Power vs. Individual Rights (The Ratification Pivot) Debate: Anti-Federalists refused to ratify the document because it centralized immense power under the Supremacy Clause without explicitly protecting individual liberties. Federalists argued that separation of powers inherently protected individuals. Agreement: Federalists promised to add a Bill of Rights immediately upon ratification, which James Madison drafted during the First Congress to safeguard civil liberties against federal overreach.

Absolutely — this is your AP U.S. Government Unit 1 test review, covering Chapters 1–3. I can turn this into a study guide with simple definitions + what you actually need to know for the test. 🇺🇸 AP Government Unit 1 Test Review 1. Foundational Documents Declaration of Independence Main idea: Government exists to protect people’s natural rights, and people can change/remove a government that violates those rights. Know: * Natural rights: life, liberty, and the pursuit of happiness * Consent of the governed: government gets its power from the people * Social contract: people give government authority in exchange for protection of rights * Influenced by John Locke * Justified the colonies’ separation from Britain Test connection: Popular sovereignty + social contract + limited government. ⸻ Articles of Confederation The first U.S. governing document. Strength: States had significant power. Problems: * Weak national government * Congress couldn’t directly tax * No executive branch * No national court system * Difficult to pass laws * Difficult to amend * Weak ability to regulate interstate commerce Why it matters: Its weaknesses helped lead to the Constitutional Convention. ⸻ U.S. Constitution Created a stronger federal government while limiting its power. Know: * Separation of powers * Checks and balances * Federalism * Popular sovereignty * Republicanism * Limited government ⸻ Federalist No. 10 Written by James Madison. Main issue: factions. Madison argued that a large republic could help control the effects of factions because there would be many competing interests. Key idea: Pluralism/competing factions can prevent one group from completely dominating government. ⸻ Federalist No. 39 Written by James Madison. Main question: Is the Constitution republican and federal? * Republican: people elect representatives * Federal: power is divided between national and state governments Madison argued that the Constitution created a system combining national and federal characteristics. ⸻ Federalist No. 51 Written by James Madison. Main idea: Checks and balances and separation of powers prevent government from becoming too powerful. Famous concept: “Ambition must be made to counteract ambition.” In simple terms: Give each branch enough power to check the others. ⸻ Brutus No. 1 Written by an Anti-Federalist. Main concern: The proposed Constitution gave too much power to the national government. Brutus feared: * Federal government would become too powerful * States would lose power * Necessary and Proper Clause could expand federal authority * Large republic might not adequately represent citizens Federalist vs. Brutus: Federalist Brutus Stronger national government Stronger state governments Large republic can control factions Large republic may be difficult to represent Constitution protects liberty Constitution could threaten liberty ⸻ 2. Court Cases McCulloch v. Maryland (1819) Issue: Could Congress create a national bank, and could Maryland tax it? Decision: No, Maryland could not tax the national bank. Why? The Constitution’s Necessary and Proper Clause gives Congress implied powers. This case strengthened: * Federal power * Implied powers * Supremacy of federal law Remember: McCulloch = Federal government wins over state government. ⸻ United States v. Lopez (1995) Issue: Could Congress use the Commerce Clause to prohibit guns near schools? Decision: No. The Supreme Court ruled that Congress had gone beyond its Commerce Clause authority. Why it matters: It limited federal power under the Commerce Clause. Easy comparison: McCulloch → expands federal power Lopez → limits federal power ⸻ 3. Constitutional Clauses Necessary and Proper Clause Also called the Elastic Clause. Allows Congress to make laws necessary and proper for carrying out its constitutional powers. Connection: Implied powers. ⸻ Supremacy Clause Federal law is generally supreme over conflicting state law. Think: Federal law > conflicting state law This was important in McCulloch v. Maryland. ⸻ Commerce Clause Gives Congress power to regulate interstate commerce. “Interstate” = between states. It has historically been an important source of federal power. Connection: United States v. Lopez. ⸻ Full Faith and Credit Clause States generally must recognize the public acts, records, and judicial proceedings of other states. Example: A court judgment from one state may need to be recognized in another state. ⸻ 4. Amendment Process — Article V The Constitution has a deliberately difficult amendment process. Proposal An amendment can be proposed by: * 2/3 of both houses of Congress OR * A convention called by Congress after 2/3 of state legislatures request one. Ratification It must then be ratified by: * 3/4 of the states Memorize: 2/3 → propose 3/4 → ratify ⸻ 5. Amendments 10th Amendment Powers not given to the federal government by the Constitution, and not prohibited to the states, are generally reserved to the states or the people. Think: Reserved powers. ⸻ 14th Amendment Very important for federalism and civil rights. Know: * Citizenship * Due process * Equal protection Equal Protection Clause States cannot deny people equal protection of the laws. Due Process Clause States must follow fair legal procedures and respect protected rights. Big connection: The 14th Amendment has been used to apply many constitutional rights to the states. ⸻ 6. Democracy Vocabulary Limited Government Government’s power is restricted by laws and the Constitution. Think: Government officials aren’t above the law. ⸻ Popular Sovereignty The people are the ultimate source of governmental power. Easy: People → government. ⸻ Republicanism People govern indirectly through elected representatives. ⸻ Social Contract The idea that people agree to give government some authority in exchange for protection and order. ⸻ Participatory Democracy Citizens are actively involved in government. Examples: * Voting * Protesting * Contacting representatives * Political campaigns * Community activism ⸻ Elite Democracy A relatively small group of influential individuals makes major political decisions. Think: Political power concentrated among elites. ⸻ Pluralist Democracy Different interest groups compete to influence government. Think: Many groups → competing interests → government responds Federalist No. 10 connects strongly to this concept. ⸻ 7. Legislature Structures Bicameral A legislature with two chambers. U.S. Congress: * House of Representatives * Senate Unicameral A legislature with one chamber. Easy: Bi = 2 Uni = 1 ⸻ 8. Plans for the Constitution Virginia Plan Wanted: * Strong national government * Three branches * Bicameral legislature * Representation based on population Favored larger states. ⸻ New Jersey Plan Wanted: * Stronger national government * Unicameral legislature * Equal representation for states Favored smaller states. ⸻ Great Compromise Solved the disagreement between the Virginia and New Jersey Plans. Created a bicameral Congress: House Representation based on population. Senate Each state gets 2 senators. Easy: House = population Senate = equal states ⸻ 9. Electoral College The system used to formally elect the president. Each state gets electoral votes based on its: * House representatives * 2 senators Total = House members + 2 senators Most states use a winner-take-all system for allocating electoral votes. Important: The president is not directly elected through one nationwide popular vote. ⸻ 10. Three-Fifths Compromise An agreement during the Constitutional Convention concerning how enslaved people would be counted for representation and taxation. For those purposes, enslaved people were counted as three-fifths of a person. This compromise was part of the Constitution’s original structure and reflected the institution of slavery. ⸻ 11. Separation of Powers Power is divided among three branches. Branch Main Function Legislative Makes laws Executive Enforces laws Judicial Interprets laws Think: Divide power. ⸻ 12. Checks and Balances Each branch can limit the power of the other branches. Examples: President → vetoes legislation Congress → overrides veto Senate → confirms presidential appointments Courts → judicial review Congress → can impeach federal officials Difference: Separation of powers = divide government power Checks and balances = branches limit each other ⸻ 13. Federalism Power is divided between: National government ↔ State governments This is different from separation of powers. Separation of powers: Between branches Federalism: Between levels of government ⸻ 14. Types of Federalism Layer Cake Federalism Also called dual federalism. Federal and state governments have separate areas of responsibility. Think: 🟫 National 🟨 State Separate layers. ⸻ Marble Cake Federalism Also called cooperative federalism. Federal and state governments work together and share responsibilities. Think: Swirled together. ⸻ 15. Preemption When federal law takes priority over conflicting state law. Connected to the Supremacy Clause. Think: Federal law can “preempt” state law. ⸻ 16. Types of Powers Exclusive Powers Powers belonging only to one level of government. Example: * Coining money → federal government ⸻ Delegated Powers Powers given to the federal government by the Constitution. Also called enumerated powers when specifically listed. Examples: * Declare war * Coin money * Regulate interstate commerce ⸻ Reserved Powers Powers reserved for states. Connected to the 10th Amendment. Examples: * Education * Local governments * Many licensing rules ⸻ Concurrent Powers Powers shared by federal and state governments. Examples: * Taxation * Courts * Law enforcement Memorize: Delegated → Federal Reserved → States Concurrent → Both ⸻ Implied Powers Powers that aren’t specifically written but are reasonably connected to Congress’s enumerated powers. Source: Necessary and Proper Clause. McCulloch v. Maryland = huge connection. ⸻ Inherent Powers Powers the national government is understood to possess because it is a sovereign nation. Example: * Conducting foreign relations ⸻ 17. Fiscal Federalism The use of federal money to influence state and local governments. Basically: Federal government → money → states/local governments ⸻ 18. Revenue Sharing The federal government gives states/local governments money with few restrictions on how it can be spent. States have significant flexibility. ⸻ 19. Incentives The federal government encourages states to do something by offering benefits, usually money. Example: Federal government: “Do X, and we’ll give you funding.” ⸻ 20. Categorical Grants Federal money given to states/local governments for a specific purpose. Very specific. Example: Federal government provides money specifically for a school nutrition program. Think: Categorical = category ⸻ 21. Block Grants Federal money given to states for a broad purpose, giving states more flexibility. Example: Money for healthcare rather than one extremely specific program. Difference: Categorical = specific Block = broad/flexible ⸻ 22. Mandates Requirements imposed by the federal government on state/local governments. Think: Federal government → “You MUST do this.” Some mandates come with funding; others may be unfunded mandates, meaning governments must comply without receiving enough federal money to cover the costs. ⸻ 23. Devolution The process of transferring power/responsibility from the federal government → state governments. Think: Federal → States ⸻ ⭐ THE BIG CONNECTIONS TO MEMORIZE These are especially useful because AP Gov questions often make you connect concepts. McCulloch v. Maryland Necessary & Proper Clause → implied powers → stronger federal government → Supremacy Clause U.S. v. Lopez Commerce Clause → limits federal power Federalist 10 Factions → large republic → competing interests → pluralism Federalist 51 Separation of powers → checks and balances → prevent tyranny Brutus 1 Fear of powerful national government → concern about federalism and individual liberty 10th Amendment Reserved powers → states 14th Amendment Equal protection + due process → limits state governments Great Compromise Virginia Plan + New Jersey Plan → bicameral Congress Fiscal Federalism Federal money → states → grants/incentives/mandates ⸻ 🧠 15 Things I Would Memorize FIRST If you’re short on time, know these cold: 1. Popular sovereignty = people have power 2. Republicanism = elected representatives 3. Limited government = government power is restricted 4. Federalism = national + state power 5. Separation of powers = three branches 6. Checks and balances = branches check each other 7. 10th Amendment = reserved powers 8. Necessary & Proper = implied powers 9. Supremacy Clause = federal law takes priority over conflicting state law 10. Commerce Clause = Congress regulates interstate commerce 11. McCulloch = expands federal power 12. Lopez = limits federal Commerce Clause power 13. Great Compromise = House by population, Senate equal 14. Categorical grant = specific 15. Block grant = broad/flexible The fastest memory trick: Federalism = levels Separation = branches Checks = limits 10th = states Necessary & Proper = implied Supremacy = federal wins Commerce = interstate McCulloch = expand Lopez = limit Categorical = specific Block = broad

Chapter 4 Skin and Body Membranes Body Membranes Functions of body membranes Cover body surfaces Line body cavities Form protective sheets around organs Classified according to tissue types Body Membranes Two major categories Epithelial membranes Cutaneous membranes Mucous membranes Serous membranes Connective tissue membranes Synovial membranes Epithelial Membranes Epithelial membranes are simple organs Also called covering and lining membranes These membranes contain both: Epithelial tissue layer Connective tissue layer Epithelial Membranes Cutaneous membrane = skin Dry membrane Outermost protective boundary Consists of two layers Epidermis is composed of keratinized stratified squamous epithelium Dermis is mostly dense (fibrous) connective tissue Epithelial Membranes • Mucous membranes (mucosae) • I Moist membranes Some mucosae secrete protective, lubricating mucus Line all body cavities that open to the exterior body surface • Adapted for absorption or secretion • ' Consists of two layers • Epithelium type depends on site • Loose connective tissue (lamina propria) Epithelial Membranes Serous membranes (serosae) Line compartments in the ventral body cavity that are ciosed to the exterior of the body Occur in pairs, separated by serous fluid, with a visceral and parietal layer Consists of two layers Simple squamous epithelium Areolar connective tissue Epithelial Membranes Specific serous membranes Peritoneum Cover organs in the abdominal cavity Pleurae Surround the lungs Pericardia Surround the heart Connective Tissue Membranes Synovial membranes Loose areolar connective tissue only (no epithelial tissue) Line fibrous capsules surrounding joints Line bursae Line tendon sheaths Secrete a lubricating fluid to cushion organs moving against each other during muscle activity Integumentary System Integumentary system consists of the: Skin (cutaneous membrane) Skin appendages Sweat glands Oil glands Hair Nails Functions of the Integumentary System Insulates and cushion deeper body organs Protects the entire body from: Mechanical damage (bumps and cuts) Chemical damage (acids and bases) Thermal damage (heat or cold) Ultraviolet (UV) radiation (sunlight) Microbes (bacteria) • Water loss Functions of the Integumentary System Regulates heat loss as controlled by the nervous system Acts as a mini-excretory system; sweat aids in the loss of Urea Salts Water Synthesizes vitamin D Secretions create a protective acid mantle Structure of the Skin Two kinds of tissue compose the skin Epidermis Dermis Subcutaneous tissue (hypodermis) Anchors the skin to underlying organs Not technically part of the integumentary system Composed mostly of adipose tissue Serves as a shock absorber and insulates deeper tissues Structure of the Skin Epidermisouter layer Composed of stratified squamous epithelium Most cells are keratinocytes which produce a fibrous protein called keratin Keratinization makes the epidermis tough Desmosomes connect keratinocytes together Avascular Composed of five layers (strata) Structure of the Skin Summary of strata (layers) of the epidermis from deepest to most superficial Stratum basale Stratum spinosum Stratum granulosum Stratum lucidum (thick, hairless skin only) Stratum corneum Structure of the Skin Stratum basale (stratum germinativum) Deepest layer of epidermis Lies next to dermis Wavy borderline with the dermis anchors the two together Cells undergoing mitosis Daughter cells are pushed upward to become the more superficial layers Stratum spinosum Cells become increasingly flatter and more keratinized Structure of the Skin Stratum granulosum Stratum lucidum Formed from dead cells of the deeper strata Occurs only in thick, hairless skin of the palms of hands and soles of feet Stratum corneum Outermost layer of epidermis Shingle-like dead cells are filled with keratin (protective protein prevents wat loss from skin Structure of the Skin Melanin Melanin is a pigment produced by melanocytes Melanocytes are mostly in the stratum basale of the epidermis Color is yellow to brown to black Structure of the Skin Epidermal dendritic cells Alert and activate immune cells to a threat (bacterial or viral invasion) Merkel cells Associated with sensory nerve endings Serve as touch receptors called Merkel discs Structure of the Skin Dermis Connective tissue Underlies the epidermis Two regions Papillary Reticular Structure of the Skin Two regions of the dermis Papillary layer (upper dermal region) contain projections called dermal papillae Areolar connective tissue Indent the epidermis above Many projections contain capillary loops, and others house pain and touch receptors On palm and sole surfaces, papillae increase friction and gripping ability Fingerprints are identifying films of sweat Structure of the Skin Two regions of the dermis Reticular layer (deepest skin layer) Dense irregular connective tissue Blood vessels Sweat and oil glands Deep pressure receptors (lamellar corpuscles) Structure of the Skin Other dermal features Cutaneous sensory receptors Phagocytes Collagen and elastic fibers Blood vessels I Nerve supply Skin Color • Three pigments contribute to skin color 1. Melanin • Yellow, reddish brown, or black pigments 2. Carotene • Orange-yellow pigment (also found in some vegetables) 3. Hemoglobin Red coloring from blood cells in dermal capillaries Oxygen content determines the extent of red coloring Skin Color Redness (erythema) due to embarrassment, inflammation, hypertension, fever, or allergy Pallor (blanching) due to emotional stress (such as fear), anemia, low blood pressure, impaired blood flow to an area Jaundice (yellow cast)-indicates a liver disorder • Bruises (black and blue marks)-hematomas Appendages of the Skin Cutaneous glands are all exocrine glands Sebaceous glands Sweat glands Hair and hair follicles Nails Appendages of the Skin Sebaceous (oil) glands Located all over the skin except for palms and soles Produce sebum (oil) Makes skin soft and moist Prevents hair from becoming brittle Kills bacteria Most have ducts that empty into hair follicles; others open directly onto skin surface Glands are activated at puberty with increased androgens Appendages of the Skin Sweat (sudoriferous) glands Produce sweat Widely distributed in skin Two types of sudoriferous glands Eccrine glands Apocrine glands Appendages of the Skin Eccrine glands More numerous, located all over the body Open via duct to sweat pores on the skin's surface Produce acidic sweat Water, salts, vitamin C, traces of metabolic waste Function in body temperature regulation Appendages of the Skin Apocrine glands Ducts empty into hair follicles in the armpit and genitals Begin to function at puberty Release sweat that also contains fatty acids and proteins (milky or yellowish color) • Play a minimal role in body temperature regulation Appendages of the Skin Hair Located body-wide except for palms, soles, nipples, lips Produced by hair follicle Root is enclosed in the follicle Shaft projects from the surface of the scalp or skin Consists of hard keratinized epithelial cells Melanocytes provide pigment for hair color Hair grows in the matrix of the hair bulb in stratum basale Appendages of the Skin Hair anatomy Central medulla Cortex surrounds medulla Cuticle on outside of cortex Most heavily keratinized region of the hair Melanin provides color Appendages of the Skin Associated hair structures Hair follicle Composed of an inner epithelial root sheath andan outer fibrous sheath Dermal region provides a blood supply to the hair bulb (deepest part of the follicle) Arrector pili muscle connects to the hair follicle to pull hairs upright when we are cold or frightened Appendages of the Skin Nails Heavily keratinized, scalelike modifications of the epidermis Stratum basale extends beneath the nail bed, which is responsible for growth Lack of pigment makes nails colorless Appendages of the Skin Parts of a nail Free edge Body is the visible attached portion Nail folds are skin folds that overlap the edges of the nail; the cuticle is the proximal edge Root of nail is embedded in skin Growth of the nail occurs from nail matrix of nail bed Homeostatic Imbalances of Skin Infections and allergies Athlete's foot Caused by fungal infection (Tinea pedis) Itchy, red peeling skin between the toes Boils (furuncles) and carbuncles Caused by inflammation of hair follicles Carbuncles are clusters of boils caused by bacteria Cold sores (fever blisters) Caused by human herpesvirus 1 Blisters itch and sting Homeostatic Imbalances of Skin Infections and allergies Contact dermatitis Caused by exposure to chemicals that provoke allergic responses Itching, redness, and swelling of the skin Impetigo Caused by bacterial infection Pink, fluid-filled raised lesions around mouth/nose Psoriasis Triggered by trauma, infection, hormonal changes, or stress Red, epidermal lesions covered with dry, silvery scales that itch, burn, Crack, or sometimes bleed Homeostatic Imbalances of Skin • Burns Tissue damage and cell death caused by heat, electricity, UV radiation, or chemicals Associated dangers Protein denaturation and cell death Dehydration and electrolyte imbalance Circulatory shock Result in loss of body fluids and infection from the invasion of bacteria Homeostatic Imbalances of Skin Extent of a burn is estimated using the rule of nines Body is divided into 11 areas for quick estimation Each area represents about 9 percent of total body surface area The area surrounding the genitals (the perineum) represents 1 percent of body surface area Homeostatic Imbalances of Skin . First-degree burn (superficial burn) Only epidermis is damaged Skin is red and swollen Second-degree burn (superficial partial-thickness burn) Epidermis and superficial part of dermis are damaged Skin is red, painful, and blistered Regrowth of the epithelium can occur Homeostatic Imbalances of Skin Third-degree burn (full-thickness burn) Destroys epidermis and dermis; burned area is painless Requires skin grafts, as regeneration is not possible Burned area is blanched (gray-white) or black Fourth-degree burn (full-thickness burn) Extends into deeper tissues (bone, muscle, tendons) Appears dry and leathery Requires surgery and grafting May require amputation Homeostatic Imbalances of Skin Criteria for deeming burns critical (if any one is met): Over 30 percent of body has second-degree burns Over 10 percent of the body has third-or fourth-degree burns Third-or fourth-degree burns of the face, hands, feet, or genitals Burns affect the airways Circumferential (around the body or limb) burns have occurred Homeostatic Imbalances of Skin Skin cancer Most common form of cancer in humans Most important risk factor is overexposure to ultraviolet (V) radiation in sunlight and tanning beds Cancer can be classified two ways Benign means the neoplasm (tumor) has not spread Malignant means the neoplasm has invaded other body areas Concept Link Recall that mitosis gone wild is the basis for cancer (Chapter 3, pp. 82-83). These cells lack normal control of cell division and divide quickly, resulting in errors during DNA replication, mitosis, or both. Cells experiencing rapid, uncontrolled growth become cancerous and can metastasize (spread) to other parts of the body. Homeostatic Imbalances of Skin . First-degree burn (superficial burn) Only epidermis is damaged Skin is red and swollen Second-degree burn (superficial partial-thickness burn) Epidermis and superficial part of dermis are damaged Skin is red, painful, and blistered Regrowth of the epithelium can occur Homeostatic Imbalances of Skin Third-degree burn (full-thickness burn) Destroys epidermis and dermis; burned area is painless Requires skin grafts, as regeneration is not possible Burned area is blanched (gray-white) or black Fourth-degree burn (full-thickness burn) Extends into deeper tissues (bone, muscle, tendons) Appears dry and leathery Requires surgery and grafting May require amputation Homeostatic Imbalances of Skin Criteria for deeming burns critical (if any one is met): Over 30 percent of body has second-degree burns Over 10 percent of the body has third-or fourth-degree burns Third-or fourth-degree burns of the face, hands, feet, or genitals Burns affect the airways Circumferential (around the body or limb) burns have occurred Homeostatic Imbalances of Skin Skin cancer Most common form of cancer in humans Most important risk factor is overexposure to ultraviolet (V) radiation in sunlight and tanning beds Cancer can be classified two ways Benign means the neoplasm (tumor) has not spread Malignant means the neoplasm has invaded other body areas Concept Link Recall that mitosis gone wild is the basis for cancer (Chapter 3, pp. 82-83). These cells lack normal control of cell division and divide quickly, resulting in errors during DNA • One or more of the ABCD characteristics is evolving Developmental Aspects of Skin and Body Membranes Lanugo, a downy hair, covers the body by the fifth or sixth month of fetal development but disappears by birth Vernix caseosa, an oily covering, is apparent at birth Milia, small white spots, are common at birth and disappear by the third week Acne may appear during adolescence Pimples, scales, and dermatitis are more common with aging skin Developmental Aspects of Skin and Body Membranes In youth, skin is thick, resilient, and well hydrated With aging, skin loses elasticity and thins Skin cancer is a major threat to skin exposed to excessive sunlight Balding (alopecia) and/or graying occurs with aging; both are genetically determined other factors that may contribute include drugs and emotional stress

Chapter 1: Structure and Function of the Muscular, Nervous, and Skeletal Systems I. The Muscular System. A. Gross Anatomy (Macrostructure) of Skeletal Muscle Connective Tissue Coverings: Epimysium: Outer layer of connective tissue surrounding the entire muscle belly.  Perimysium: Connective tissue surrounding bundles of muscle fibers (fascicles).  Endomysium: Connective tissue surrounding individual muscle fibers.  Tendon: Extension of connective tissues that connects muscle to bone to transmit force.  B. Microscopic Anatomy of Skeletal Muscle Muscle Fiber (Cell): Sarcolemma: The muscle cell membrane that encloses cell contents and conducts electrical impulses.  Sarcoplasm: Cytoplasm of the muscle cell containing ATP, glycogen, enzymes, and organelles.  Multinucleated: Muscle cells contain multiple nuclei located along the cell membrane.  Mitochondria: Organelles responsible for aerobic ATP production.  Sarcoplasmic Reticulum (SR): Internal network storing calcium ions (\bm{\text{Ca}^{2+}}) necessary for muscle action.  Transverse Tubules (T-Tubules): Channels running perpendicular to the myofibrils that carry action potentials deep into the cell.  C. Myofibrils & Sarcomere Structure Myofibril: Columnar protein structures containing contractile filaments.  Myofilaments: Myosin (Thick Filament): Consists of a head, neck, and tail; forms cross-bridges with actin.  Actin (Thin Filament): Globular protein structures containing binding sites for myosin heads. Associated with troponin and tropomyosin (regulatory proteins).  Sarcomere: The basic contractile unit of a muscle fiber bounded by Z-lines.  Z-line: Anchors actin filaments; marks the boundary of a sarcomere.  A-band: Alignment of myosin filaments (dark area).  I-band: Region containing only thin (actin) filaments (light area).  H-zone: Center of the A-band containing only thick (myosin) filaments.  M-line: Center anchor line for adjacent myosin filaments.  II. Neuromuscular Junction & Sliding Filament Theory A. Neuromuscular Junction (NMJ) Point of communication between a motor neuron and a skeletal muscle fiber.  Acetylcholine (ACh): Neurotransmitter released from the axon terminal into the synaptic cleft upon arrival of an action potential.  B. Steps in the Sliding Filament Theory 1. Action Potential: An impulse travels down the motor neuron to the axon terminal.  2. ACh Release: ACh is released into the synaptic cleft and binds to receptors on the sarcolemma.  3. Depolarization & \bm{\text{Ca}^{2+}} Release: The action potential travels along the T-tubules, triggering the release of calcium (\bm{\text{Ca}^{2+}}) from the sarcoplasmic reticulum into the sarcoplasm.  4. Troponin-Tropomyosin Shift: Calcium binds to troponin, causing a conformational change that moves tropomyosin away from myosin-binding sites on actin.  5. Cross-Bridge Formation: Energized myosin heads bind to open active sites on actin.  6. Power Stroke: Hydrolysis of ATP drives the power stroke; myosin pulls actin filaments toward the center of the sarcomere (H-zone shortens).  7. Detachment & Reset: A fresh ATP molecule binds to the myosin head, causing detachment from actin. ATP is hydrolyzed by myosin ATPase, re-energizing the head for subsequent cycles as long as calcium and ATP remain present.  III. Muscle Fiber Types & Actions A. Types of Muscle Actions Concentric: Muscle force exceeds external resistance; muscle shortens.  Eccentric: External force exceeds muscle force; muscle lengthens while developing tension.  Isometric: Muscle force equals external resistance; muscle length does not change.  B. Classification of Muscle Fibers Type I (Slow-Twitch / Slow Oxidative): High fatigue resistance, high aerobic capacity, high myoglobin content, lower force output, and slower contraction speed.  Dominant during endurance activities (e.g., walking, marathon running).  Type IIa (Fast-Twitch / Fast Oxidative-Glycolytic): Moderate fatigue resistance, hybrid aerobic/anaerobic capacity, moderate force production, fast contraction speed.  Type IIx (Fast-Twitch / Fast Glycolytic): Low fatigue resistance, high power/force output, high glycolytic capacity, very fast contraction speed.  Dominant during short-duration explosive movements (e.g., sprinting, heavy resistance training).  IV. The Nervous System A. Organization Central Nervous System (CNS): Brain and spinal cord.  Peripheral Nervous System (PNS): Nerve fibers outside the CNS.  Motor (Efferent) Neurons: Carry impulses from the CNS to peripheral effectors (muscles).  Sensory (Afferent) Neurons: Relay sensory inputs from sensory receptors (muscle, skin) back to the CNS.  Autonomic vs. Somatic: Somatic: Controls voluntary functions (e.g., skeletal muscle activation).  Autonomic: Controls involuntary functions (heart rate, digestion) via Sympathetic ("fight-or-flight") and Parasympathetic ("rest-and-digest") branches.  B. Proprioceptors Muscle Spindle: Sensory organs aligned in parallel with extrafusal muscle fibers.  Sensitive to changes in muscle length and rate of length change.  Triggers the myotatic (stretch) reflex, causing rapid concentric contraction of the stretched muscle to prevent overstretching.  Golgi Tendon Organ (GTO): Sensory receptors located in series within tendons near the neuromuscular junction.  Activated by excessive tension produced within the muscle. Causes reflex inhibition (relaxation) of the active muscle to protect against tendon damage or injury.

Unit 2 Vocabulary: Freedom, Enslavement, and Resistance

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Chapter 1 : Cell Biology The study of cells, their structures, and their functions. Cell Theory All living organisms are composed of one or more cells; cells are the smallest living things and basic units of organization; cells arise only from previously existing cells. Fundamental Unit of Life The cell. Plasma Membrane A structure found in all cells that surrounds the cell. Cytoplasm The area of the cell that includes the cytosol. Cytosol The fluid portion of the cell outside the organelles. Genetic Material The DNA contained within cells. Prokaryote An organism whose cells do not have a true nucleus. Eukaryote An organism whose cells have a true nucleus. Prokaryotes Bacteria and Archaea. Eukaryotes Animals, plants, fungi, and protists. Prokaryotic Cell Usually a single cell with no true nucleus and typically one circular chromosome. Eukaryotic Cell A cell with a true nucleus and membrane-bound organelles. True Nucleus A nucleus that contains DNA and is enclosed by a nuclear envelope. Virus A non-cellular entity that requires cells to survive and reproduce. Obligate Intracellular Parasite An organism or entity that requires a cell to survive and reproduce; viruses are sometimes called this. Light Microscope A microscope that can be used to view live or dead cells and can show structures such as the membrane, nucleus, cytoplasm, and larger organelles. Electron Microscope A microscope with much higher resolution than a light microscope; specimens must be fixed (dead). TEM Transmission Electron Microscopy; used to examine thin sections of tissues and internal structures. SEM Scanning Electron Microscopy; used to examine surfaces of cells or tissues. Fluorescence Microscopy Microscopy that uses fluorescent labels to see specific tagged cell structures. Cell Resolution The human eye resolves about 200 µm, while typical cells are about 5–20 µm. Nucleus Contains DNA and is involved in DNA replication. Mitochondria Organelles that make ATP through aerobic cellular respiration. ATP The energy-containing molecule produced by mitochondria. Aerobic Cellular Respiration The process carried out by mitochondria to make ATP. Chloroplast An organelle involved in photosynthesis and found in plant cells. Photosynthesis The process in which light energy and CO2 are used to produce food. Rough ER The organelle involved in making proteins; it has ribosomes attached to it. Ribosomes Structures associated with the rough ER that are involved in protein production. Smooth ER An organelle involved in making lipids, storage, and modifying carbohydrates. Golgi Apparatus Modifies and sorts proteins and helps transport them. Vesicle A membrane-bound structure involved in transporting materials between organelles and to the plasma membrane. Exocytosis The process involving vesicles releasing materials through the plasma membrane. Cytoskeleton A system of filaments important for cell organization, structure, and movement. Actin Filaments Cytoskeletal structures involved in muscle contraction, cell crawling, cell shape, and pseudopodial cell extension. Microtubules Cytoskeletal structures involved in vesicle transport, chromosome movement, cilia, flagella, and the mitotic spindle. Intermediate Filaments Cytoskeletal structures important for stability and structural support. Mitotic Spindle A structure made of microtubules that helps move chromosomes during cell division. Cell Wall A structure found in plant cells and many prokaryotes that provides support. Vacuole A structure found in plant cells; plant cells have vacuoles in addition to their other organelles. Endosymbiosis The engulfment of bacteria by a larger cell. Endosymbiont Theory The theory that mitochondria and chloroplasts evolved from bacteria that were engulfed by ancestral cells. Mitochondrial Origin According to endosymbiont theory, mitochondria arose from an aerobic bacterium taken up by an anaerobic bacteria-like ancestor of eukaryotic cells. Chloroplast Origin According to endosymbiont theory, chloroplasts arose from photosynthetic bacteria taken up by an aerobic eukaryotic ancestor of plants. Evidence for Endosymbiont Theory Mitochondria and chloroplasts are bacteria-sized, have two membranes, have bacterial-like ribosomes, contain their own DNA, and divide similarly to bacteria. Mitochondrial DNA Mitochondria contain their own DNA, including a single circular chromosome similar to bacteria. Chloroplast DNA Chloroplasts contain their own DNA, including a single circular chromosome similar to bacteria. Double Membrane Mitochondria and chloroplasts have two membranes, supporting the endosymbiont theory. Common Ancestor Hypothesis The hypothesis that organisms descended from an ancestral prokaryote called LUCA or LUA. LUCA The Last Universal Common Ancestor; an ancestral prokaryote in the common ancestor hypothesis. Genome The genetic material of an organism, containing protein-coding genes and regulatory regions.y

Chapter 1 : Cell Biology The study of cells, their structures, and their functions. Cell Theory All living organisms are composed of one or more cells; cells are the smallest living things and basic units of organization; cells arise only from previously existing cells. Fundamental Unit of Life The cell. Plasma Membrane A structure found in all cells that surrounds the cell. Cytoplasm The area of the cell that includes the cytosol. Cytosol The fluid portion of the cell outside the organelles. Genetic Material The DNA contained within cells. Prokaryote An organism whose cells do not have a true nucleus. Eukaryote An organism whose cells have a true nucleus. Prokaryotes Bacteria and Archaea. Eukaryotes Animals, plants, fungi, and protists. Prokaryotic Cell Usually a single cell with no true nucleus and typically one circular chromosome. Eukaryotic Cell A cell with a true nucleus and membrane-bound organelles. True Nucleus A nucleus that contains DNA and is enclosed by a nuclear envelope. Virus A non-cellular entity that requires cells to survive and reproduce. Obligate Intracellular Parasite An organism or entity that requires a cell to survive and reproduce; viruses are sometimes called this. Light Microscope A microscope that can be used to view live or dead cells and can show structures such as the membrane, nucleus, cytoplasm, and larger organelles. Electron Microscope A microscope with much higher resolution than a light microscope; specimens must be fixed (dead). TEM Transmission Electron Microscopy; used to examine thin sections of tissues and internal structures. SEM Scanning Electron Microscopy; used to examine surfaces of cells or tissues. Fluorescence Microscopy Microscopy that uses fluorescent labels to see specific tagged cell structures. Cell Resolution The human eye resolves about 200 µm, while typical cells are about 5–20 µm. Nucleus Contains DNA and is involved in DNA replication. Mitochondria Organelles that make ATP through aerobic cellular respiration. ATP The energy-containing molecule produced by mitochondria. Aerobic Cellular Respiration The process carried out by mitochondria to make ATP. Chloroplast An organelle involved in photosynthesis and found in plant cells. Photosynthesis The process in which light energy and CO2 are used to produce food. Rough ER The organelle involved in making proteins; it has ribosomes attached to it. Ribosomes Structures associated with the rough ER that are involved in protein production. Smooth ER An organelle involved in making lipids, storage, and modifying carbohydrates. Golgi Apparatus Modifies and sorts proteins and helps transport them. Vesicle A membrane-bound structure involved in transporting materials between organelles and to the plasma membrane. Exocytosis The process involving vesicles releasing materials through the plasma membrane. Cytoskeleton A system of filaments important for cell organization, structure, and movement. Actin Filaments Cytoskeletal structures involved in muscle contraction, cell crawling, cell shape, and pseudopodial cell extension. Microtubules Cytoskeletal structures involved in vesicle transport, chromosome movement, cilia, flagella, and the mitotic spindle. Intermediate Filaments Cytoskeletal structures important for stability and structural support. Mitotic Spindle A structure made of microtubules that helps move chromosomes during cell division. Cell Wall A structure found in plant cells and many prokaryotes that provides support. Vacuole A structure found in plant cells; plant cells have vacuoles in addition to their other organelles. Endosymbiosis The engulfment of bacteria by a larger cell. Endosymbiont Theory The theory that mitochondria and chloroplasts evolved from bacteria that were engulfed by ancestral cells. Mitochondrial Origin According to endosymbiont theory, mitochondria arose from an aerobic bacterium taken up by an anaerobic bacteria-like ancestor of eukaryotic cells. Chloroplast Origin According to endosymbiont theory, chloroplasts arose from photosynthetic bacteria taken up by an aerobic eukaryotic ancestor of plants. Evidence for Endosymbiont Theory Mitochondria and chloroplasts are bacteria-sized, have two membranes, have bacterial-like ribosomes, contain their own DNA, and divide similarly to bacteria. Mitochondrial DNA Mitochondria contain their own DNA, including a single circular chromosome similar to bacteria. Chloroplast DNA Chloroplasts contain their own DNA, including a single circular chromosome similar to bacteria. Double Membrane Mitochondria and chloroplasts have two membranes, supporting the endosymbiont theory. Common Ancestor Hypothesis The hypothesis that organisms descended from an ancestral prokaryote called LUCA or LUA. LUCA The Last Universal Common Ancestor; an ancestral prokaryote in the common ancestor hypothesis. Genome The genetic material of an organism, containing protein-coding genes and regulatory regions.

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Exam Review Chapters 1, 2, & 3. Chapter 1 The Science of Psychology Behavior: Everything, we do that can be directly observed. Behavioral approach: an approach to psychology emphasizing the scientific study of observable behavioral responses and their environmental determinants. Biological approach: an approach to psychology focusing on the body, especially the brain and nervous system. Case study or case history: an in-depth look at a single individual. Cognitive approach: an approach to psychology emphasizing the mental processes involved in knowing: how we direct our attention, perceive, remember, think, and solve problems. Control group: The participants in an experiment who are as much like the experimental group as possible and who are treated in every way like the experimental group except for a manipulated factor, the independent variable. Correlational research: research that examines the relationships between variables, whose purpose is to examine whether and how two variables change together. Critical thinking: The process of thinking deeply and actively, asking questions, and evaluating the evidence. Dependent variable: The outcome; the factor that can change in an experiment in response to changes in the independent variable. Double-blind experiment: An experimental design in which neither the experimenter nor the participants are aware of which participants are in the experimental group and which are in the control group until the results are calculated. Evolutionary approach: An approach to psychology centered on evolutionary ideas such as adaptation, reproduction, and natural selection as the basis for explaining specific human behaviors. Experiment: A carefully regulated procedure in which the researcher manipulates one or more variables that are believed to influence some other variable. Experimental group: The participants in an experiment who receive the drug or other treatment under study—that is, those who are exposed to the change that the independent variable represents. Functionalism: James’s approach to mental processes, emphasizing the functions and purposes of the mind and behavior in the individual’s adaptation to the environment. Humanistic approach: An approach to psychology emphasizing a person’s positive qualities, the capacity for positive growth, and the freedom to choose any destiny. Hypothesis: A testable prediction that derives logically from a theory. Independent variable: A manipulated experimental factor; the variable that the experimenter changes to see what its effects are. Longitudinal design: A special kind of systematic observation, used by correlational researchers, that involves obtaining measures of the variables of interest in multiple waves over time. Mental processes: The thoughts, feelings, and motives that people experience privately but that cannot be observed directly. Natural selection: Darwin’s principle of an evolutionary process in which organisms that are best adapted to their environment will survive and produce offspring. Naturalistic observation: The observation of behavior in a real-world setting. Placebo: In a drug study, a harmless substance that has no physiological effect, given to participants in a control group so that they are treated identically to the experimental group except for the active agent. Placebo effect: The situation where participants’ expectations, rather than the experimental treatment, produce an experimental outcome. Population: The entire group about which the researcher wants to draw conclusions. Psychoanalysis: techniques involves an analyst unlocking a person's unconscious conflicts by talking with the individual about his or her childhood memories, dreams, thoughts, and feelings. Psychodynamic approach: an approach to psychology emphasizing unconscious thought, the conflict between biological drives (such as the drive for sex) and society’s demands, and early childhood family experiences. Psychology: The scientific study of behavior and mental processes. Sample: The subset of the population chosen by the investigator for study. Sociocultural approach: an approach to psychology that examines the ways in which social and cultural environments influence behavior. Structuralism: Wundt’s approach to discovering the basic elements, or structures, of mental processes. Theory: A broad idea or set of closely related ideas that attempts to explain observations and to make predictions about future observations. Validity: The soundness of the conclusions that a researcher draws from an experiment. In the realm of testing, the extent to which a test measures what it is intended to measure. Variable: Anything that can change. Wilhelm Wundt is most often regarded the "founding father" of modern psychology. He was also the founder of structuralism. William James was the founder of functionalism. J. B. Watson and B. F. Skinner believed that psychology should focus on an organism's visible interactions with the environment—that is, behaviors. Ethical Guidelines developed by the American Psychological Association include: • informed consent. • confidentiality. • deception. • debriefing. Chapter 2 The Brain and Behavior Action potential: The brief wave of positive electrical charge that sweeps down the axon. Adrenal glands: glands at the top of each kidney that are responsible for regulating moods, energy level, and the ability to cope with stress. Amygdala: An almond-shaped structure within the base of the temporal lobe that is involved in the discrimination of objects that are necessary for the organism’s survival, such as appropriate food, mates, and social rivals. Association cortex: Sometimes called association areas, the region of the cerebral cortex that is the site of the highest intellectual functions, such as thinking and problem solving. Autonomic nervous system: The body system that takes messages to and from the body’s internal organs, monitoring such processes as breathing, heart rate, and digestion. Axon The part of the neuron that carries information away from the cell body toward other cells. Basal ganglia Large neuron clusters located above the thalamus and under the cerebral cortex that work with the cerebellum and the cerebral cortex to control and coordinate voluntary movements. Brain stem The stem like brain area that includes much of the hindbrain (excluding the cerebellum) and the midbrain; connects with the spinal cord at its lower end and then extends upward to encase the reticular formation in the midbrain. Cell body The part of the neuron that contains the nucleus, which directs the manufacture of substances that the neuron needs for growth and maintenance. Central nervous system (CNS): The brain and spinal cord. Cerebral cortex: Part of the forebrain, the outer layer of the brain, responsible for the most complex mental functions, such as thinking and planning. Chromosomes: In the human cell, threadlike structures that come in 23 pairs, one member of each pair originating from each parent, and that contain DNA. Corpus callosum: The large bundle of axons that connects the brain’s two hemispheres, responsible for relaying information between the two sides. Dendrites: Treelike fibers projecting from a neuron, which receive information and orient it toward the neuron’s cell body. Deoxyribonucleic acid (DNA): A complex molecule in the cell’s chromosomes that carries genetic information. Dominant-recessive genes principle: The principle that if one gene of a pair is dominant and one is recessive, the dominant gene overrides the recessive gene. A recessive gene exerts its influence only if both genes of a pair are recessive. Endocrine system: The body system consisting of a set of glands that regulate the activities of certain organs by releasing their chemical products into the bloodstream. Forebrain: The brain’s largest division and its most forward part. Frontal lobes: The portion of the cerebral cortex behind the forehead, involved in personality, intelligence, and the control of voluntary muscles. Genes: The units of hereditary information, consisting of short segments of chromosomes composed of DNA. Genotype: An individual’s genetic heritage; his or her actual genetic material. Glands: Organs or tissues in the body that create chemicals that control many bodily functions. Glial cells: The second of two types of cells in the nervous system; glial cells (also called glia) provide support, nutritional benefits, and other functions and keep neurons running smoothly. Hindbrain: Located at the skull’s rear, the lowest portion of the brain, consisting of the medulla, cerebellum, and pons. Hippocampus: The structure in the limbic system that has a special role in the storage of memories. Hormones: Chemical messengers that are produced by the endocrine glands and carried by the bloodstream to all parts of the body. Hypothalamus: A small forebrain structure, located just below the thalamus, that monitors three pleasurable activities—eating, drinking, and sex—as well as emotion, stress, and reward. Limbic system: A set of subcortical brain structures central to emotion, memory, and reward processing. Midbrain: Located between the hindbrain and forebrain, an area in which many nerve-fiber systems ascend and descend to connect the higher and lower portions of the brain; in particular, the midbrain relays information between the brain and the eyes and ears. Motor cortex: A region in the cerebral cortex, located just behind the frontal lobes, that processes information about voluntary movement. Myelin sheath: A layer of fat cells that encases and insulates most axons. Neocortex: The outermost part of the cerebral cortex, making up 80 percent of the human brain’s cortex. Nervous system: The body’s electrochemical communication circuitry. Neural networks: Networks of nerve cells that integrate sensory input and motor output. Neurons: One of two types of cells in the nervous system; neurons are the nerve cells that handle the information-processing function. Neurotransmitters: Chemical substances that are stored in very tiny sacs within the neuron’s terminal buttons and involved in transmitting information across a synaptic gap to the next neuron. Occipital lobes: Structures located at the back of the head that respond to visual stimuli. Ovaries: Sex-related endocrine glands that produce hormones involved in women’s sexual development and reproduction. Pancreas: A dual-purpose gland under the stomach that performs both digestive and endocrine functions. Parasympathetic nervous system: The part of the autonomic nervous system that calms the body. Parietal lobes: Structures at the top and toward the rear of the head that are involved in registering spatial location, attention, and motor control. Peripheral nervous system (PNS): The network of nerves that connects the brain and spinal cord to other parts of the body. Phenotype: An individual’s observable characteristics. Pituitary gland: A pea-sized gland just beneath the hypothalamus that controls growth and regulates other glands. Plasticity: The brain’s special capacity for change. Prefrontal cortex: an important part of the frontal lobes that is involved in higher cognitive functions such as planning, reasoning, and self-control. Resting potential, The stable, negative charge of an inactive neuron. Reticular formation: A system in the midbrain comprising a diffuse collection of neurons involved in stereotyped patterns of behavior such as walking, sleeping, and turning to attend to a sudden noise. Somatic nervous system: The body system consisting of the sensory nerves, whose function is to convey information from the skin and muscles to the central nervous system about conditions such as pain and temperature, and the motor nerves, whose function is to tell muscles what to do. Somatosensory cortex: A region in the cerebral cortex that processes information about body sensations, located at the front of the parietal lobes. Stem cells: Unique primitive cells that have the capacity to develop into most types of human cells. Stress: The responses of individuals to environmental stressors. Stressors: Circumstances and events that threaten individuals and tax their coping abilities and that cause physiological changes to ready the body to handle the assault of stress. Sympathetic nervous system: The part of the autonomic nervous system that arouses the body to mobilize it for action and thus is involved in the experience of stress. Synapses: Tiny spaces between neurons; the gaps between neurons are referred to as synaptic gaps. Temporal lobes: Structures in the cerebral cortex that are located just above the ears and are involved in hearing, language processing, and memory. Testes: Sex-related endocrine glands in the scrotum that produce hormones involved in men’s sexual development and reproduction. Thalamus: The forebrain structure that sits at the top of the brain stem in the brain’s central core and serves as an important relay station. Left Hemisphere • verbal processing, speech, grammar Right Hemisphere • spatial perception • visual recognition • emotion Chapter 3 Sensation and Perception Absolute threshold: The minimum amount of stimulus energy that a person can detect. Apparent movement: The perception that a stationary object is moving. Auditory nerve: The nerve structure that receives information about sound from the hair cells of the inner ear and carries these neural impulses to the brain’s auditory areas. Binding: In the sense of vision, the bringing together and integration of what is processed by different neural pathways or cells. Binocular cues: Depth cues that depend on the combination of the images in the left and right eyes and on the way the two eyes work together. Bottom-up processing: The operation in sensation and perception in which sensory receptors register information about the external environment and send it up to the brain for interpretation. Cones: The receptor cells in the retina that allow for color perception. Convergence: A binocular cue to depth and distance in which the muscle movements in an individual’s two eyes provide information about how deep and/or far away something is. Depth perception: The ability to perceive objects three-dimensionally. Difference threshold: The degree of difference that must exist between two stimuli before the difference is detected. Feature detectors: Neurons in the brain’s visual system that respond to particular features of a stimulus. Figure-ground relationship: The principle by which we organize the perceptual field into stimuli that stand out (figure) and those that are left over (ground). Frequency theory: Theory on how the inner ear registers the frequency of sound, stating that the perception of a sound’s frequency depends on how often the auditory nerve fires. Gestalt psychology A school of thought interested in how people naturally organize their perceptions according to certain patterns. Inner ear: The part of the ear that includes the oval window, cochlea, and basilar membrane and whose function is to convert sound waves into neural impulses and send them to the brain. Kinesthetic senses: Senses that provide information about movement, posture, and orientation. Middle ear: The part of the ear that channels and amplifies sound through the eardrum, hammer, anvil, and stirrup to the inner ear. Monocular cues: Powerful depth cues available from the image in one eye, either the right or the left. Noise: Irrelevant and competing stimuli—not only sounds but also any distracting stimuli for the senses. Olfactory epithelium: The lining of the roof of the nasal cavity, containing a sheet of receptor cells for smell. Opponent-process theory: Theory stating that cells in the visual system respond to complementary pairs of red-green and blue-yellow colors; a given cell might be excited by red and inhibited by green, whereas another cell might be excited by yellow and inhibited by blue. Optic nerve: The structure at the back of the eye, made up of axons of the ganglion cells, that carries visual information to the brain for further processing. Outer ear: The outermost part of the ear, consisting of the pinna and the external auditory canal. Pain: The sensation that warns an individual of damage to the body. Papillae: Rounded bumps above the tongue’s surface that contain the taste buds, the receptors for taste. parallel processing: The simultaneous distribution of information across different neural pathways. Perception: The process of organizing and interpreting sensory information so that it makes sense. perceptual constancy: The recognition that objects are constant and unchanging even though sensory input about them is changing. perceptual set A predisposition or readiness to perceive something in a particular way. place theory: Theory on how the inner ear registers the frequency of sound, stating that each frequency produces vibrations at a particular spot on the basilar membrane. retina The multilayered light-sensitive surface in the eye that records electromagnetic energy and converts it to neural impulses for processing in the brain. Rods: The receptor cells in the retina that are sensitive to light but not very useful for color vision. selective attention: The act of focusing on a specific aspect of experience while ignoring others. semicircular canals: Three fluid-filled circular tubes in the inner ear containing the sensory receptors that detect head motion caused when an individual tilts or moves the head and/or the body. Sensation: The process of receiving stimulus energies from the external environment and transforming those energies into neural energy. sensory adaptation: A change in the responsiveness of the sensory system based on the average level of surrounding stimulation. sensory receptors: Specialized cells that detect stimulus information and transmit it to sensory (afferent) nerves and the brain. signal detection theory: An approach to perception that focuses on decision making about stimuli in the presence of uncertainty. subliminal perception The detection of information below the level of conscious awareness. Thermoreceptors: Sensory nerve endings under the skin that respond to changes in temperature at or near the skin and provide input to keep the body’s temperature at 98.6 degrees Fahrenheit. top-down processing The operation in sensation and perception, launched by cognitive processing at the brain’s higher levels, that allows the organism to sense what is happening and to apply that framework to information from the world. trichromatic theory: Theory stating that color perception is produced by three types of cone receptors in the retina that are particularly sensitive to different, but overlapping, ranges of wavelengths. vestibular sense: Sense that provides information about balance and movement. visual cortex: Located in the occipital lobe, the part of the cerebral cortex involved in vision. volley principle: Principle addressing limitations of the frequency theory of hearing, stating that a cluster of nerve cells can fire neural impulses in rapid succession, producing a volley of impulses. Weber’s law: The principle that two stimuli must differ by a constant minimum percentage (rather than a constant amount) to be perceived as different.

Enslavement and Trans-Atlantic Trade Vocabulary

The trade of Enslaved Africans

🇺🇸 APUSH CRAM SHEET PERIOD 1: 1491–1607 — Native America & Exploration Native American Societies * Iroquois Confederacy → political alliance of Native nations * Pueblo peoples → Southwest; agriculture, irrigation * Mississippian societies → Cahokia; agriculture and complex societies Columbian Exchange Americas → Europe * Corn * Potatoes * Tomatoes * Tobacco * Cacao Europe/Africa → Americas * Horses * Cattle * Sugar * Wheat * Diseases ⚠️ Major consequence: Native populations dramatically declined because of European diseases. Exploration * Christopher Columbus (1492) → opened sustained European contact * Treaty of Tordesillas (1494) → Spain/Portugal divided claims in the Americas * Encomienda System → Spanish forced Native labor ⸻ PERIOD 2: 1607–1754 — Colonies Jamestown — 1607 * First permanent English settlement * Virginia Company * John Smith → helped colony survive * Tobacco → major cash crop * John Rolfe → tobacco cultivation Important Virginia Developments * House of Burgesses (1619) → representative government * Headright System → encouraged immigration by giving land * Growth of slavery Plymouth & Massachusetts * Pilgrims → Plymouth, 1620 * Mayflower Compact → self-government * Puritans → Massachusetts Bay * John Winthrop → “city upon a hill” Religion Puritans: wanted to reform the Church of England Quakers: * Religious tolerance * Equality * Pennsylvania * William Penn Bacon’s Rebellion — 1676 * Nathaniel Bacon led frontier farmers against Virginia government * Showed conflict between wealthy elites and poorer colonists * Contributed to increased reliance on enslaved labor Colonial Economies New England * Fishing * Shipbuilding * Trade * Small farms Middle Colonies * Grain * Trade * Diverse population Southern Colonies * Tobacco * Rice * Indigo * Plantation agriculture * Slavery ⸻ PERIOD 3: 1754–1800 — Revolution & Constitution French & Indian War — 1754–1763 Britain vs. France + Native allies Consequences * Britain wins * Britain gains territory * Britain has massive debt * Britain begins taxing colonies Proclamation of 1763 * Colonists prohibited from settling west of Appalachian Mountains * Angered colonists ⸻ Road to Revolution Tax Acts Stamp Act (1765) * Tax on printed materials * “No taxation without representation” Townshend Acts (1767) * Taxes on imports * Led to colonial resistance Boston Massacre (1770) * British soldiers killed colonists * Patriot propaganda Boston Tea Party (1773) * Colonists protested Tea Act Intolerable Acts (1774) * Punished Massachusetts * Helped unite colonies ⸻ Declaration of Independence — 1776 Thomas Jefferson Main ideas: * Natural rights * Life, liberty, pursuit of happiness * Government gets power from the people * People can overthrow an abusive government ⸻ Revolutionary War Turning Points Saratoga (1777) → Major American victory → France joins American side Yorktown (1781) → Cornwallis surrendered → Major fighting effectively ended Treaty of Paris (1783) → Britain recognized U.S. independence ⸻ Articles of Confederation Strengths * Won Revolutionary War * Land Ordinance of 1785 * Northwest Ordinance of 1787 Weaknesses * No power to tax * No executive branch * No national court system * Weak central government ⸻ Constitution Great Compromise * House of Representatives → population * Senate → equal representation 3/5 Compromise * Enslaved people counted as 3/5 for representation and taxation Federalists vs. Anti-Federalists Federalists * Strong national government * Hamilton * Madison * Jay Anti-Federalists * Feared centralized power * Wanted Bill of Rights Bill of Rights — 1791 First 10 amendments ⸻ PERIOD 4: 1800–1848 — Expansion & Democracy Jefferson Election of 1800 * Peaceful transfer of power * Jefferson becomes president Louisiana Purchase — 1803 * Bought from France * Doubled U.S. territory Lewis & Clark * Explored western territory ⸻ War of 1812 Causes: * British impressment * British interference with trade * British support for Native resistance Effects * Increased nationalism * Weakened Federalist Party * Encouraged American manufacturing ⸻ Market Revolution Transportation * Canals * Roads * Railroads * Steamboats Industrialization * Factories grew * Wage labor expanded * Cities grew Erie Canal → connected Great Lakes to Hudson River ⸻ Jacksonian Democracy Andrew Jackson * Expanded voting for white men * Spoils system * Popular democracy Indian Removal Act — 1830 * Forced Native Americans west * Trail of Tears * Major example of U.S. expansion and Native displacement Bank War Jackson opposed the national bank. ⸻ Manifest Destiny Belief that the U.S. was destined to expand across North America. Texas * Texas declared independence from Mexico * Alamo * Texas becomes U.S. state in 1845 Mexican-American War — 1846–1848 U.S. victory → Mexican Cession Treaty of Guadalupe Hidalgo * U.S. gained California, New Mexico and huge western territory ⸻ PERIOD 5: 1844–1877 — Civil War & Reconstruction Sectionalism North * Industry * Free labor * Railroads * Growing cities South * Plantation economy * Cotton * Slavery West * Competition over whether slavery would expand ⸻ Slavery Cotton Gin * Eli Whitney * Made cotton processing faster * Increased demand for enslaved labor Missouri Compromise — 1820 * Missouri → slave * Maine → free * 36°30′ line Compromise of 1850 * California → free * Popular sovereignty in Utah/New Mexico * Fugitive Slave Act strengthened Kansas-Nebraska Act — 1854 * Popular sovereignty * Repealed Missouri Compromise * Led to Bleeding Kansas Dred Scott v. Sandford — 1857 Supreme Court ruled: * African Americans were not citizens * Congress couldn’t prohibit slavery in territories Lincoln-Douglas Debates Major issue → slavery’s expansion ⸻ Civil War Election of 1860 Abraham Lincoln wins Southern states secede. Emancipation Proclamation — 1863 * Freed enslaved people in rebelling states * Changed war aims toward ending slavery Gettysburg — 1863 Major Union victory Gettysburg Address * Equality * Democracy * “new birth of freedom” Appomattox — 1865 Lee surrendered to Grant. ⸻ Reconstruction — 1865–1877 13th Amendment Abolished slavery 14th Amendment Citizenship + equal protection 15th Amendment Voting rights for Black men Freedmen’s Bureau * Helped formerly enslaved people * Education * Employment * Food/housing assistance Black Codes Southern laws restricting African Americans after the Civil War. Ku Klux Klan Used violence and intimidation to suppress Black political participation. Compromise of 1877 * Ended disputed 1876 election * Federal troops withdrawn from South * Reconstruction effectively ended ⚠️ APUSH connection: Reconstruction achieved major constitutional changes but failed to permanently protect many of those gains. ⸻ PERIOD 6: 1865–1898 — Gilded Age Industrialization Important Industrialists * Andrew Carnegie → steel * John D. Rockefeller → oil * J.P. Morgan → banking/finance Robber Barons vs. Captains of Industry Robber Baron → exploited workers, monopolies Captain of Industry → created jobs/industry and sometimes philanthropy Social Darwinism Applied survival-of-the-fittest ideas to society/economics. ⸻ Labor Knights of Labor * Broad membership * Wanted better working conditions AFL * Samuel Gompers * Skilled workers * Higher wages * Shorter hours Major Strikes Haymarket Affair → labor unrest + anarchism Homestead Strike → Carnegie Steel Pullman Strike → railroad workers → federal government intervened ⸻ Immigration Old Immigration Mostly: * Northern/Western Europe New Immigration Mostly: * Southern/Eastern Europe * Italians * Poles * Russians Chinese Exclusion Act — 1882 Restricted Chinese immigration. ⸻ Urbanization Problems: * Tenements * Disease * Crime * Poor sanitation Political machines * Ex: Tammany Hall * Provided services in exchange for votes ⸻ PERIOD 7: 1890–1945 — Progressive Era & World Wars Progressivism Goals: * Reduce corruption * Regulate corporations * Improve working conditions * Consumer protection * Women’s suffrage Muckrakers Investigative journalists exposing problems. Upton Sinclair → The Jungle → exposed meatpacking conditions → helped inspire Meat Inspection Act & Pure Food and Drug Act Theodore Roosevelt Square Deal * Trust busting * Conservation * Consumer protection 16th Amendment → Federal income tax 17th Amendment → Direct election of senators 18th Amendment → Prohibition 19th Amendment → Women’s suffrage ⸻ Imperialism Spanish-American War — 1898 U.S. victory U.S. gains influence over: * Puerto Rico * Guam * Philippines Open Door Policy U.S. wanted equal trade access in China. Roosevelt Corollary U.S. claimed right to intervene in Latin America. ⸻ World War I Causes Think MAIN * Militarism * Alliance system * Imperialism * Nationalism U.S. enters in 1917. Wilson’s Fourteen Points * Self-determination * League of Nations * International cooperation Treaty of Versailles Senate rejected it. ⸻ 1920s Consumer Culture * Cars * Radios * Movies * Advertising Harlem Renaissance African American cultural movement. Important figures: * Langston Hughes * Zora Neale Hurston * Duke Ellington Great Migration African Americans moved from South → Northern/Western cities. ⸻ Great Depression Causes * Stock market speculation * Bank failures * Unequal wealth * Overproduction * Consumer debt FDR’s New Deal Relief → help people now Recovery → rebuild economy Reform → prevent future depression Important Programs CCC → jobs for young men WPA → public works/jobs Social Security Act → retirement assistance FDIC → protects bank deposits SEC → regulates stock market ⸻ World War II Pearl Harbor — 1941 Japan attacks U.S. U.S. enters WWII. Japanese American Internment Executive Order 9066 → forced relocation/internment D-Day — 1944 Allied invasion of Europe. Manhattan Project Developed atomic bomb. Hiroshima & Nagasaki Atomic bombs used against Japan. Japan surrenders → 1945 ⸻ PERIOD 8: 1945–1980 — Cold War & Civil Rights Cold War U.S. vs. USSR Capitalism vs. Communism Truman Doctrine Contain communism. Marshall Plan Economic aid to rebuild Europe. NATO Western military alliance. Korean War U.S. supports South Korea against communist North Korea. ⸻ Civil Rights Movement Brown v. Board — 1954 School segregation unconstitutional. Rosa Parks Montgomery Bus Boycott Martin Luther King Jr. * Nonviolent protest * Civil rights Civil Rights Act — 1964 Banned segregation/discrimination in many public settings. Voting Rights Act — 1965 Protected voting rights. Malcolm X Initially promoted Black nationalism/self-defense; later shifted views toward broader cooperation. ⸻ Vietnam War Domino Theory If one country becomes communist, nearby countries may follow. Gulf of Tonkin Resolution Expanded presidential power in Vietnam. Vietnamization Nixon’s policy of reducing U.S. troops while South Vietnam took more responsibility. Effects * Antiwar movement * Distrust of government * War Powers Act ⸻ PERIOD 9: 1980–Present Reagan Reaganomics Tax cuts + deregulation + reduced government spending Conservative Movement * Lower taxes * Smaller government * Anti-communism * Traditional social values Cold War Ends 1989 → Berlin Wall falls 1991 → USSR collapses ⸻ ⭐ MUST-KNOW APUSH THEMES 1. Federal Power Articles → weak government ↓ Constitution → stronger government ↓ Civil War → massive federal expansion ↓ New Deal → federal government expands economically ↓ Great Society → federal government expands social programs ⸻ 2. Race Colonial slavery ↓ Expansion of slavery ↓ Civil War ↓ 13th/14th/15th Amendments ↓ Jim Crow ↓ Civil Rights Movement ↓ Civil Rights Act + Voting Rights Act ⸻ 3. Expansion Louisiana Purchase ↓ Manifest Destiny ↓ Mexican-American War ↓ Westward expansion ↓ Imperialism ↓ Overseas influence ⸻ 4. Economy Agricultural colonies ↓ Market Revolution ↓ Industrial Revolution ↓ Gilded Age corporations ↓ Great Depression ↓ New Deal ↓ Modern consumer economy ⸻ 🔥 20 EVENTS YOU ABSOLUTELY NEED TO KNOW Date Event 1492 Columbus 1607 Jamestown 1620 Plymouth 1754–63 French & Indian War 1776 Declaration of Independence 1781 Articles/ Yorktown 1787 Constitution 1803 Louisiana Purchase 1812 War of 1812 1820 Missouri Compromise 1830 Indian Removal Act 1846–48 Mexican-American War 1854 Kansas-Nebraska Act 1861–65 Civil War 1863 Emancipation Proclamation 1865 13th Amendment 1898 Spanish-American War 1929 Great Depression begins 1941 Pearl Harbor 1954 Brown v. Board 1964 Civil Rights Act 1965 Voting Rights Act 🧠 APUSH Essay Formula For LEQs/DBQs, remember: Claim → Evidence → Explain → Connect Don’t just say what happened. Instead: Evidence: The Kansas-Nebraska Act repealed the Missouri Compromise. Analysis: This increased sectional tensions because it allowed slavery to potentially expand into territories previously closed to it, contributing to the breakdown of political compromise before the Civil War. APUSH loves CAUSATION, CHANGE/CONTINUITY, and COMPARISON. Ask yourself: * Why did this happen? * What did it cause? * What changed? * What stayed the same? * Who benefited? * Who was harmed? * How does this connect to another period

Ebola Outbreak Investigation Review