Anatomy and physiology ch. 5 The Integumentary System Flashcards

0
Q

functions of the skin

A

the functions of the skin are protection, sensation, temperature regulation, excretion, and vitamin D production.

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1
Q

Components of the skin

A

the skin consists of the epidermis and the dermis.

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2
Q

skin functions: protection

A

the skin protects against abrasion, uv, microorganisms, and water loss

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3
Q

functions of the skin: sensation

A

the skin has receptors that detect temp changes and touch/ pressure/ pain

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4
Q

Functions of the skin: Vitamin D production

A

when exposed to uv, the skin makes a molecule that can be turned into vitamin D

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5
Q

Functions of the skin: temperature regulation

A

the skin can change the amount of dilation in it’s vessels, and it can activate the sweat glands to regulate temperature

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6
Q

functions of the skin: excretion

A

small amounts of waste products are lost though the skin and in gland secretions

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7
Q

epidermis

A

the most superficial layer of the skin

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8
Q

dermis

A

a layer of connective tissue.

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9
Q

hypodermis

A

a layer of connective tissue connecting the dermis to the bone

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10
Q

layers of the epidermis

A
stratum corneum
stratum luciduum
stratum granulosum
stratum spinosum
stratum basale
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11
Q

stratum corneum

A

the highest layer of the epidermis, it has dead squamous cells that are keratinized

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12
Q

stratum lucidum

A

only found in thick skin of the palm and sole. this layer is composed of 3-5 layers of dead cells

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13
Q

stratum granulosum

A

this is the middle layer of the epidermis. it is 3-5 layers thick. cells pushed from below in this layer start to die.

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14
Q

statum spinosum

A

this layer of cells has a spiny appearance. this layer is composed of 8-10 layers of cell. these cell absorb melanin via phagocytosis

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15
Q

stratum basale

A

deepest layer of the epidermis. it is made up of a single row of actively dividing cells and is attached to the basement membrane. this layer contains skin stem cells, melanocytes, and keratinocytes.

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16
Q

dermis

A

consists of the papillary layer and the reticular layer

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17
Q

cleavage lines

A

lines of tension in the skin

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18
Q

papillary layer

A

projections that go up into the dermis, also the cause of fingerprints

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19
Q

reticular layer

A

makes up 80% of the dermis

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20
Q

hair bulb

A

living part of the hair

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21
Q

hair follicle

A

projection from the epidermis

22
Q

arrector pili

A

smooth muscle that raises hair in response to cold

23
Q

pacinian corpuscle

A

used for deep pressure touch

24
Q

meissner’s corpuscle

A

used for light brisk touch

25
Q

merkels disk

A

Small, superficial nerve endings involved in detecting light touch and superficial pressure.

26
Q

sebaceous glands

A

attached to the hair follicle, they release cebum

27
Q

eccrine sweat glands

A

normal sweat glands

28
Q

apocrine sweat glands

A

produce a thick secretion from hair, found in armpit and genetalia

29
Q

hypodermis

A

attaches the dermis to the bone. also contains about half of the body’s stored fat

30
Q

melanocyte

A

cell that produces melanin. found almost equally in all individuals.

31
Q

carotene

A

yellow pigment that changes the skin color. lipid soluble.

32
Q

albinism

A

a disease that causes a deficiency or an absence of melanin

33
Q

uv light

A

made of UVA and UVB, this is converted by the skin to make vitamin D. UVA exposure may result in malignant melanoma, UVB exposure will likely result in basal cell and squamous cell carcinoma.

34
Q

redness

A

a reddening of the skin. may indicate infection, fever, hypertension, allergies

35
Q

pallor

A

where the skin is pale. may indicate anemia or low blood pressure

36
Q

jaundice

A

skin is yellow. may indicate that there is a problem with the liver

37
Q

bronzing

A

is a symptom of Addison’s disease (adrenal gland disorder)

38
Q

bruising

A

indicates broken blood vesssels

39
Q

nail body

A

the visible part of the nail

40
Q

nail root

A

the part of the nail covered by skin.

41
Q

eponychium

A

stratum corneum that extends into the nail body

42
Q

nail matrix

A

where the nail root extends from.

43
Q

lunula

A

the whitish crescent-shaped part of the nail located near the cuticle.

44
Q

aging of skin

A

as the body ages, the layer of the epidermis thins, and the amount of collagen in the dermis decreases, and a loss of elastic tissue

45
Q

1st degree burns

A

involve only the epidermis; are red and painful

46
Q

2nd degree burns

A

also known as partial thickness burns, they burn the epidermis and part of the dermis. redness, pain, edema, and blisters may appear

47
Q

3rd degree burn

A

full thickness burn; the epidermis and the dermis are completely destroyed; these are usually painless because the nerves are completely destroyed; usually requires skin grafts, and are prone to infection.

48
Q

the rule of nine

A

head +neck front+back =9%, front and back of arm 9%, anterior superior torso 9%, anterior inferior torso 9%, posterior superior torso 9%, posterior inferior torso 9%, lower extremity front 9%, lower extremity back 9%, genital 1%

49
Q

basal cell carcinoma

A

the most frequent type, starts with cells in the stratum basale, and extends into the dermis.

50
Q

squamous cell carcinoma

A

starts in cells superior to s. basale. the result is a nodular, keratinized tumor that is confined to the epidermis.

51
Q

malignant melanoma

A

rare skin cancer that comes from melanocytes; metastasis is common, and can be often fatal.

52
Q

ABCDE’s of skin cancer

A
A-Asymmetrical
B- Borders are irregular
C-Color changes
D-Diameter changes
E-Evolves rapidly