A&P Exam 3 Flashcards

1
Q

Ch. 6

What are some functions of the skin?

A

resistance to trauma and infection, is a barrier for water, UV rays, vitamin D synthesis. As well as sensation, thermoregulation, and nonverbal communication.

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2
Q

Ch. 6

Skin is made of three main layers. What are they?

A

Epidermis, dermis, and hypodermis.

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3
Q

Ch. 6

Define Epidermis.

A

keratinized stratified squamous epithelium

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4
Q

Ch. 6

What is the deepest epidermal layer?

A

Stratum basale

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5
Q

Ch. 6

What are the five epidermal cell types?

A

Stem cells, keratinocytes, melanocytes, tactile cells, dendritic cells

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5
Q

Ch. 6

Thick skin is found…

A

palms of your hand, soles of your feet

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6
Q

Ch. 6

How many layers does thick skin have?

A

5

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7
Q

Ch. 6

How many layers does thin skin have?

A

4

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8
Q

Ch. 6

Where is thin skin located?

A

Everywhere besides the palms and soles of your feet.

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9
Q

Ch. 6

Define Dermis.

A

connective tissue layer beneath epidermis

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10
Q

Ch. 6

Define Dermal Papillae

A

upward, finger-like extensions of dermis

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11
Q

Ch. 6

Define Papilary Layer within the Dermis

A

superficial zone of dermis, one of the two layers of the dermis

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12
Q

Ch. 6

What kind of tissue is the Papilary layer made of?

A

loose areolar tissue

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13
Q

Ch. 6

Define Reticular Layer within the Dermis.

A

deeper and thicker layer of the dermis, beneath the papilary layer

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14
Q

Ch. 6

What kind of tissue is the Reticular Layer made of?

A

dense irregular connective tissue.

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15
Q

Ch. 6

What is the deepest layer of skin?

A

hypodermis

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16
Q

Ch. 6

What is special about the hypodemis?

A

it is technically not part of the skin, but included because dermis anchors to it.

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17
Q

Ch. 6

Define Melanin.

A

most significant factor in skin color, produced by melanocytes

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18
Q

Ch. 6

What are the two types of pigment in skin?

A

Eumelanin and Pheomelanin

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19
Q

Ch. 6

What other pigments can influence skin color?

A

Hemoglobin and Carotene

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20
Q

Ch. 6

Define Pilus

A

another name for hair

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21
Q

Where do you not find hair?

A

palms, soles, palmar, plantar, lips, nipples, parts of genitals

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22
Q

Ch. 6

Hair can be divised into how many zones along it’s length?

A

3

23
Q

Ch. 6

What is a bulb?

A

a division of hair, a swelling at the base where hair originates in dermis or hypodermis.

24
Q

Ch. 6

What is the dermal papila?

A

bud of vascular connective tissue encased by bulb

The only source of nutrition for hair

25
Q

Ch. 6

What is the hair matrix?

A

region of mitotically active cells immediately above papilla

Hair’s growth center

26
Q

Ch. 6

What are the three layers of hair in a cross section?

A

medulla, cortex, and cuticle

27
Q

Ch. 6

What are the three stages of losing your hair?

A

Anagen, Catagen and Telogen.

28
Q

What are sudoriferous glands?

A

sweat glands

29
Q

What are the two types of sudorifeous glands?

A

aprocrine and merocrine

30
Q

What are Myoepithelial cells?

A

contract in response to stimulation by sympathetic nervous system and squeeze perspiration up the duct

31
Q

What is a sebum?

A

oily secretion of subaceous glands, keeps skin/hair from becoming dry, brittle

32
Q

What are sebaceous glands?

A

flask shaped, have short openings into hair folicles

33
Q

What is the most common skin cancer?

A

basal cell carcinomia

34
Q

What the the three types of skin cancer?

A

basal cell, squamous cell, malignant melanoma

35
Q

Classify a first-degree burn.

A

involves only the epidermis, heals in days, regular sunburn

36
Q

Classify a second-degree burn.

A

“partial thickness” burn, involves part of the dermis, two weeks to several months to heal, may leave scars

37
Q

Classify a third-degree burn.

A

“full thickness” burn, involves epidermis and all of the dermis, often some deeper tissues.

38
Q

Are UVA rays tanning or burning rays?

A

tanning rays

39
Q

Third-degree burns often require…

A

a skin graft

40
Q

Define Autograft

A

tissue taken from another location off a person’s body

41
Q

Define Split-skin graft

A

taking the epidermis and part of the dermis from an undamaged area

42
Q

Define Isograft

A

skin from an identical twin

43
Q

Define Homograft

A

skin from an unrelated person

44
Q

Define Heterograft

A

skin from another species

45
Q

What are some functions of the skeleton? (6)

A

support, protection, movement, electrolyte balance, acid-base balance, blood formation

46
Q

What are the 5 different bone shapes/classifications?

A

flat, long, short, sesamoid, irregular

47
Q

Define compact bone

A

dense outer shell of bone

48
Q

Define cancellous (spongy) bone

A

loosely organized bone tissue

49
Q

Define nutrient foramina

A

minute holes in bone surface that allows blood vessels to penetrate

50
Q

What is bone?

A

connective tissue that consists of cells, fibers, and ground substance

51
Q

What are the four principal types of bone cells?

A

osteogenic, osteoblasts, osteocytes, osteoclasts

52
Q

Define bone marrow

A

soft tissue occupying marrow cavities of long bones and small spaces of spongy bones

53
Q

What are the two methods of developing bones?

A

intramembranous and ednochondral ossification

54
Q

What are the two types of bone marrow?

A

Yellow and Red