Integumentary, Nervous, and Musculoskeletal System: Functions, Structures, and Aging Effects

What is the major function of the integumentary system?

To cover and protect the body.

What does jaundice indicate?

A yellowish color indicating potential internal issues.

What does pallor refer to?

An abnormally pale appearance.

What is flushing?

Redness of the skin.

What does cyanosis indicate?

A bluish or gray color.

What changes in skin color must be reported to the nurse immediately?

Abnormally pale skin, flushed appearance, bluish hue, yellowish hue, general change in skin color, emergence of a new rash, changes in an existing rash, changes in the appearance of a mole.

What are the two distinct layers of the skin?

Epidermis and dermis.

What is the outer layer of the skin called?

Epidermis.

What is the deepest layer of the skin called?

Dermis.

What layer rests beneath the skin?

Subcutaneous tissue.

Where is the epidermis thickest?

On the soles of the feet and the palms of the hands.

Where is the epidermis very thin?

In areas such as the eyelids.

What are the characteristics of the epidermis?

It contains no blood vessels and consists of two sublayers.

What is keratin?

A protein that causes cells to thicken and become resistant to water.

What is melanin?

A dark pigment that gives color to the skin, hair, and eyes.

What does the dermis contain?

Elastic connective tissue, blood vessels, nerves, sensory receptors, sebaceous glands, sweat glands, and hair follicles.

What do sebaceous glands secrete?

Sebum, an oily substance that lubricates the skin.

What are the two types of sweat glands?

Eccrine glands and apocrine glands.

What is the function of eccrine glands?

They produce a thin, watery liquid that cools the body via evaporation.

What do apocrine glands produce?

A thicker substance responsible for body odor.

What roles does hair serve?

It covers the body, helps maintain warmth, and develops within a follicle.

What are nails composed of?

Specialized skin cells hardened by keratin.

What is the primary function of the integumentary system?

Protection, maintenance of fluid balance, regulation of body temperature, sensation, vitamin D production, elimination, and absorption.

What causes wrinkle formation in aging skin?

Loss of collagen and thinning of adipose tissue.

What are age spots?

Melanin deposits in specific areas like the face or back of the hands.

What are pressure ulcers?

Injuries that form when a body part presses against a surface for several hours.

What are the four clinical stages of a pressure ulcer?

Progression from the epidermis through the dermis, hypodermis, muscle, to the bone.

What are risk factors for developing pressure ulcers?

Advanced age, poor nutrition, moisture on the skin, cardiovascular and respiratory problems, friction and shearing injuries.

What are factors that hinder wound healing?

Multiple or severe injuries, chronic illness, very young or old age, malnourishment, and dehydration.

What are the classifications of burns?

Superficial (1st degree), partial thickness (2nd degree), full-thickness (3rd degree).

What is a lesion?

Any break in the skin.

What is a rash?

A group of lesions, which may be localized or systemic.

What is a partial thickness burn?

Involves the top and middle layers of the skin.

What is a full-thickness burn?

Involves all layers of the skin.

What is dermatitis?

Inflammation of the skin.

What is eczema?

A type of chronic dermatitis.

What is erythema?

Redness of the skin.

What are macules?

Small, flat, discolored lesions.

What are papules?

Small, raised, firm lesions.

What are vesicles?

Blister-like lesions filled with clear, watery fluid.

What are pustules?

Vesicles specifically containing pus.

What is a fissure?

A crack in the skin caused by fungal infections or extreme dryness.

What should be checked in patient care for lesions?

Care plans for specific instructions; ordered soaps or lotions.

What clothing should be provided to patients with skin lesions?

Loose, comfortable clothing to avoid irritation.

What should be discouraged in patients with skin lesions?

Scratching; soft mittens may be necessary.

What is anatomy?

The scientific study of the physical characteristics of the body.

What does physiology study?

The scientific study of biological function.

What is clinical significance?

Alterations in the normal state of a person's anatomy or physiology that lead to diseases.

What are the levels of organization in the human body?

Cells, Tissues, Organs, Organ systems.

What is the basic unit of life?

The cell.

What are the biological needs of a cell?

Oxygen, Water, Nutrition, Ability to eliminate metabolic waste.

What are the four essential life processes of a cell?

Organization, Metabolism, Growth, Reproduction.

What are the four main types of tissues in the human body?

Epithelial tissue, Connective tissue, Muscle tissue, Nervous tissue.

What is the primary function of epithelial tissue?

Protection of the body and its components.

Where is epithelial tissue located?

Covers the outside of the body, lines internal structures, forms glands.

What are the primary functions of connective tissue?

Joins other tissues, provides support, creates structural framework.

Where is cardiac muscle found?

Exclusively in the heart.

What is the function of skeletal muscle?

Facilitates the movement of the body.

What is the primary function of nervous tissue?

Information conduction and communication between body parts.

What does homeostasis mean?

Staying similar; maintaining internal balance.

What is an acute disease?

A disease with a rapid onset and a relatively short duration.

What is a chronic disease?

A disease that persists over a long period of time.

What are infectious diseases caused by?

Pathogens.

What are degenerative diseases?

Diseases that occur when the tissues of the body physically wear out.

What are nutritional disorders caused by?

Dietary imbalances.

What are metabolic disorders?

Disorders where the body cannot metabolize or absorb specific nutrients.

What do immune disorders affect?

The behavior of the immune system.

What are risk factors for disease development?

Age, Sex, Heredity, Lifestyle choices, Chronic diseases, Emotional health, Occupation.

What is the fundamental building block of the nervous system?

The neuron.

What are dendrites responsible for?

Receiving information

What is the function of the axon?

Sending information

What is myelin?

A protective sheath that surrounds the axon

What are the two main divisions of the nervous system?

Central Nervous System (CNS) and Peripheral Nervous System (PNS)

What does the Central Nervous System (CNS) comprise?

The brain and the spinal cord

What does the Peripheral Nervous System (PNS) consist of?

Nerves located outside of the brain and spinal cord

What are the four primary parts of the brain?

Cerebrum, Diencephalon, Brain stem, Cerebellum

What protects the brain?

The skull and the meninges

What are the layers of the meninges?

Dura mater, Arachnoid mater, Pia mater

What functions does the cerebrum perform?

Controls voluntary movement, interprets sensory information, facilitates speech, memory, thinking, and emotions

What is the role of the thalamus?

Functions as a relay station for routing messages to the cerebrum

What does the hypothalamus control?

Body temperature, fluid balance, appetite, sleep cycles, and some emotions

What are the three parts of the brain stem?

Midbrain, Pons, Medulla

What essential functions does the brain stem control?

Respiration, heartbeat, and blood pressure

What is the function of the cerebellum?

Coordinates muscle commands, allows smooth movement, and plays a role in balance

What is the main connection between the brain and the body?

The spinal cord

What types of nerves are in the Peripheral Nervous System (PNS)?

Sensory Nerves and Motor Nerves

What do sensory nerves do?

Carry information from internal organs and the outside world to the spinal cord and brain

What do motor nerves do?

Carry information from the brain to the rest of the body for muscle movement

What is homeostasis?

The regulation and adjustment of the body to maintain a stable internal environment

What are the two branches of the autonomic system?

Sympathetic Nervous System and Parasympathetic Nervous System

What does the sympathetic nervous system do?

Starts actions or speeds processes up (fight-or-flight response)

What does the parasympathetic nervous system do?

Stops actions or slows processes down

What are common effects of aging on the nervous system?

Slower reaction times, small attention deficits, slight memory changes

What is a Transient Ischemic Attack (TIA)?

A temporary episode of dysfunction caused by decreased blood flow to the brain

What is a stroke also known as?

Cerebrovascular accident (CVA) or brain attack

What are common symptoms of a stroke?

Personality changes, drooping eyelid, slurred speech, paralysis, severe headache

What is Parkinson's disease caused by?

Insufficient dopamine production in the brain

What does the acronym 'TRAP' stand for in Parkinson's disease?

'T' for Tremor, 'R' for Rigidity, 'A' for Akinesia, 'P' for Postural instability

What is Multiple Sclerosis (MS)?

An autoimmune disorder where the immune system attacks myelin sheaths

What are the types of paralysis from spinal cord injuries?

Quadriplegia (neck down) and Paraplegia (waist down)