A&P Exam 1 Study Guide

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42 Terms

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Anatomy

The study of the structure of body parts and their relationships to one another.

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Physiology

The study of the function of body parts and the body as a whole.

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Levels of Structural Organization

The human body is organized into cells, tissues, organs, organ systems, and the organism level.

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Functional Characteristics Necessary for Life

Includes responsiveness, growth, reproduction, respiration, digestion, metabolism, and excretion.

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Homeostasis

The ability to maintain a stable internal environment despite external changes.

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Negative Feedback

A mechanism that reverses a change in a controlled condition; for example, regulation of body temperature.

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Positive Feedback

A mechanism that enhances or intensifies a change in a controlled condition; for example, childbirth.

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Body Cavities

Spaces within the body that contain organs; examples include the cranial, thoracic, abdominal, and pelvic cavities.

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Plasma Membrane

The outer boundary of the cell that regulates what enters and exits; contains proteins for transport, signaling, and cell recognition.

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Intercellular Junctions

Structures that connect cells together, such as tight junctions, desmosomes, and gap junctions.

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Diffusion

The passive movement of particles from an area of higher concentration to an area of lower concentration.

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Osmosis

The diffusion of water through a selectively permeable membrane.

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Active Transport

The movement of substances against their concentration gradient, which requires energy.

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Epithelial Tissue

A type of tissue that forms protective layers and is involved in secretion and absorption.

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Microscopy Preparation

The steps involved in creating tissue sections include fixation, embedding, sectioning, and staining.

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Types of Epithelial Tissue

Includes simple squamous, cuboidal, columnar, stratified, pseudostratified, and transitional epithelia, each with specific functions and locations.

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Exocrine Glands

Glands that secrete products into ducts; examples include sweat and salivary glands.

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Endocrine Glands

Glands that secrete hormones directly into the bloodstream; examples include thyroid and adrenal glands.

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Embryonic Tissue Layers

The three layers are ectoderm, mesoderm, and endoderm, which develop into different tissue types.

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Cutaneous Membrane

The skin, which provides protection and helps regulate temperature.

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Mucous Membrane

A membrane that lines body cavities opening to the exterior, secreting mucus for lubrication.

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Serous Membrane

A membrane that lines closed body cavities and covers organs; secretes serous fluid.

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Connective Tissue

A diverse group of tissues that provide support, bind other tissues together, and store energy.

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Cells of Connective Tissue

Includes fibroblasts, adipocytes, macrophages, and mast cells, each with specific roles.

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Structural Elements of Connective Tissue

Includes cells, fibers (collagen, elastic, reticular), and ground substance.

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Scurvy

A condition caused by vitamin C deficiency, leading to impaired collagen production.

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Types of Connective Tissue

Include loose, dense, adipose, blood, bone, and cartilage tissues, each with specific functions.

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Role of Perichondrium

A dense layer of connective tissue that surrounds cartilage, providing nutrients and support.

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Tissue Growth and Repair

Tissues can undergo hyperplasia, hypertrophy, atrophy, or metaplasia during growth, repair, and loss.

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Stem Cells

Undifferentiated cells that have the potential to become different cell types; include embryonic and adult stem cells.

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Wound Healing Stages

Includes hemostasis, inflammation, proliferation, and remodeling.

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Components of the Epidermis

Includes keratinocytes, melanocytes, Langerhans cells, and Merkel cells.

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Layers of the Epidermis

Stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale.

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Skin Color Variation Factors

Determined by melanin levels, blood flow, and thickness of the stratum corneum.

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Hair Follicle Structure

Composed of the follicle bulb, dermal papilla, and shafts; associated with arrector pili muscles and sebaceous glands.

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Hair Growth Cycle

Includes anagen (growth), catagen (transition), and telogen (resting) phases.

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Structure of Fingernail

Consists of the nail plate, nail bed, cuticle, and lunula, providing protection and support.

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Cutaneous Gland Secretions

Includes sweat, sebum, and pheromones, each serving different functions.

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Types of Burns

Classified as first, second, and third-degree burns, based on depth and severity.

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Rule of Nines

A method for estimating the total body surface area affected by burns, guiding treatment.

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Skin Cancers

Includes basal cell carcinoma, squamous cell carcinoma, and melanoma, distinguished by appearance and aggressiveness.

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ABCDs of Melanoma

Asymmetry, Border irregularity, Color variation, and Diameter larger than 6mm, used for identifying melanoma.