integumentary Flashcards

1
Q

-consists of the skin, hair, glands, and nails.

-protects us from the external environment. Other functions include sensation, vitamin D production, temperature regulation, and excretion of small amounts of waste products.

A

integumentary system

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2
Q

stratified squamous epithelium divided into strata.

A

epidermis

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3
Q

from deep to superficial are stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.

A

strata

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4
Q

produced in the stratum basale.

A

new cells

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5
Q

consists of many layers of dead squamous cells containing keratin. The most superficial layers are sloughed.

A

stratum corneum

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6
Q

the transformation of stratum basale cells into stratum corneum cells.

A

Keratinization

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7
Q

results from keratin inside the cells and from desmosomes, which hold the cells together.

A

structural strength

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8
Q

surrounding the stratum corneum cells help prevent fluid loss.

A

lipids

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9
Q

dense connective tissue.

A

dermis

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10
Q

provide structural strength, and the blood vessels of the papillae supply the epidermis with nutrients.

A

collagen and elastic fibers

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11
Q

produce melanin, which is responsible for different skin colors.

A

melanocytes

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12
Q

production is determined genetically but can be modified by exposure to ultraviolet light and by hormones.

A

melanin

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13
Q

a plant pigment ingested as a source of vitamin A, can cause the skin to appear yellowish.

A

carotene

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14
Q

produces a red skin color, whereas decreased blood flow causes a pale skin color.

A

increased blood flow

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15
Q

results in the blue skin color of cyanosis.

A

Decreased blood O

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16
Q

collagen produces a bluish color.

A

scattering of light

17
Q

which is not part of the skin, is loose connective tissue that attaches the skin to underlying tissues. About half of the body’s lipids are stored.

A

subcutaneous tissue

18
Q

-columns of dead, keratinized epithelial cells. Each hair consists of a shaft (above the skin), a root (below the skin), and a hair bulb (site of hair cell formation).”

-have a growth phase and a resting phase.

A

hairs

19
Q

which are smooth muscles, causes hair to “stand on end” and produces a “goose bump.”

A

contraction of the arrector pili

20
Q

produce sebum, which oils the hair and the surface of the skin.

A

sebaceous glands

21
Q

produce sweat, which cools the body.

A

eccrine sweat glands

22
Q

produce an organic secretion that causes body odor when broken down by bacteria.

A

apocrine sweat glands

23
Q

consists of the nail body and the nail root.

A

nail

24
Q

produces the nail, which is composed of stratum corneum cells containing hard keratin.

A

nail matrix

25
Q

-reduces water loss, prevents the entry of microorganisms, and provides protection against abrasion and ultraviolet light; hair and nails also perform protective functions.

-contains sensory receptors for pain, heat, cold, and pressure.

A

skin

26
Q

stimulates the production of a precursor molecule in the skin that is modified by the liver and kidneys into vitamin D

A

ultraviolet light

27
Q

increases calcium uptake in the small intestine.

A

vitamin D

28
Q

-Through dilation and constriction of blood vessels, the skin controls heat loss from the body.

-Evaporation of sweat cools the body.

A

temperature regulation

29
Q

Skin glands remove small amounts of waste products but are not important in excretion.

A

excretion

30
Q

easily observed and often reflects events occurring in other parts of the body (e.g., cyanosis, jaundice, rashes).

A

integumentary system

31
Q

damage only the epidermis (first-degree burn) or the epidermis and the dermis (second-degree burn).

A

partial thickness burns

32
Q

(third-degree burns) destroy the epidermis, the dermis, and usually underlying tissues.

A

full thickness burns

33
Q

damage tissue deeper than the subcutaneous tissue, including muscle and bone.

A

fourth degree burns