Integumentary Flashcards

1
Q

What are the primary functions of skin?

A
  • protection
  • water barrier
  • UV light barrier
  • Sensory receptor
  • Thermal regulation
  • Vitamin D Synthesis
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2
Q

What is skin?

A

Largest organ of the body

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3
Q

Roughly what percent of body weight is skin?

A

Fifteen percent

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4
Q

How many layers of skin are there and what are they?

A

Three: Epidermis, Dermis, Hypodermis

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5
Q

How many layers of Epidermis are there and what are they?

A

Stratum Corneum, Stratum Lucidum, Stratum Granulosum, Stratum Spinosum, Stratum Basale

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6
Q

What is the Stratum Corneum?

A

The top layer of the epidermis, made of dead cells.

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7
Q

What is the Stratum Lucidum?

A

Found only in very thick skin between the corneum and the granulosum, made of dead cells being pushed up.

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8
Q

What is the Stratum Granulosum?

A

Last layer of living cells being pushed to the top of the epidermis, located between the Lucidum(in thick skin) or Corneum and the Spinosum

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9
Q

What is the Stratum Spinosum?

A

Layer of living/thriving new cells in between the stratum granulosum and stratum basale.

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10
Q

What is the Stratum Basale?

A

The base layer of the Epidermis bordering the Dermis, single layer of new cells on the basement membrane undergoing mitosis. Merkel discs and melanocytes reside here.

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11
Q

What is a Merkel Disc?

A

The tactile cell in the stratum basale of the epidermis that senses pressure.

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12
Q

What is a melanocyte?

A

A Melanin cell that provides yellow/brown pigment

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13
Q

What is a keritinocyte?

A

the water proofing cell, provides yellow pigment

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14
Q

What is hemoglobin?

A

The red pigment molecule in red blood cells

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15
Q

aden/o

A

gland

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16
Q

adip/o

A

fat/lipid

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17
Q

steat/o

A

fat/lipid

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18
Q

lip/o

A

fat/lipid

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19
Q

crypt/o

A

hidden

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20
Q

cutane/o

A

skin

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21
Q

derm/o

A

skin

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22
Q

dermat/o

A

skin

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23
Q

hidr/o

A

sweat

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24
Q

icthy/o

A

dry/scaly

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25
Q

kerat/o

A

horny skin/hard/cornea

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26
Q

myc/o

A

fungus

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27
Q

onychh/o

A

nail

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28
Q

ungu/o

A

nail

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29
Q

pil/o

A

hair

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30
Q

trich/o

A

hair

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31
Q

scler/o

A

hardening

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32
Q

xer/o

A

dry

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33
Q

How many burn classifications are there and what are they?

A

Three: First degree, Second degree, and third degree

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34
Q

What is the rule of nines used for?

A

Determining how critical a burn is.

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35
Q

A burn is considered critical by the second degree in the rule of nines…

A

When over 25% of the body has 2nd degree burns

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36
Q

A burn is considered critical by the third degree in the rule of nines…

A

When over 10% of the body has 3rd degree burns - or - 3rd degree burns are on face, hands, or feet

37
Q

The percentage of the trunk in the Rule of Nines

A

(Rule of Nines body part) Ant/Pos 36%

38
Q

The percentage of the Head and Neck in the Rule of Nines

A

(Rule of Nines body part) Ant/Pos 9%

39
Q

The percentage of the Limbs in the Rule of Nines

A

(Rule of Nines body part) Ant/Pos L/R:9% Both:18%

40
Q

The percentage of the Lower Limbs in the Rule of Nines

A

(Rule of Nines body part)

Ant/Pos L/R:18% Both:36%

41
Q

The percentage of the genitalia in the Rule of Nines

A

(Rule of Nines body part)

1%

42
Q

Burn is considered first degree when…

A

Only goes through epidermis

43
Q

Burn is considered second degree when…

A

Goes through epidermis and upper dermal layer

44
Q

Burn is considered third degree when…

A

“Full thickness” goes through epidermis and full dermis

45
Q

An Ulcer is…?

A

A sore where the tissue is being eaten away/deteriorated from lack of blood flow and potentially creates an opening in the skin

46
Q

Decubitus Ulcer is caused by….? Especially over…?

A

Restriction of normal blood supply (ischemia leading to infarction/necrosis)
Occurs over bony projections

47
Q

What are the 3 types of skin cancer benign to most malignant?

A

Basal cell carcinoma, squamous cell carcinoma, Melanoma

48
Q

Metastasis

A

Spreading of cancer cells from original tumor sites to other areas

49
Q

What is the ABCD rule and what does it characterize?

A

Characterizes Melanomas, Asymmetry, Border, Color, Diameter, (Sometimes E{Elevation})

50
Q

What percentage of skin cancers are melanomas?

A

Only 5% of cancers are.

51
Q

What causes skin cancer

A

induced by UV rays of the sun, when cell cycle gets disrupted

52
Q

What are the skin appendages or “accessory organs” in the dermis?

A

Sweat glands, Nails, Hair follicles

53
Q

What are the types cutaneous glands?

A

Apocrine sweat, Eccrine sweat, sebaceous

54
Q

Function and placement of Apocrine glands

A

“Dirty” sweat gland, releases watery secretion filled w/ fatty acids. Only near hair follicles- found in axillary and anogenital areas

55
Q

Function and placement of Eccrine glands

A

“clean” sweat gland, releases mostly water secretions. Open directly out skin thru ducts. All over surface of the body

56
Q

Function and placement of Sebaceous glands

A

Secretes sebum, cells burst to create secretion, found only by hair follicles

57
Q

What is sebum?

A

Oil secreted from sebaceous gland that softens skin, kills bacteria, and slows water loss.

58
Q

Holocrine Gland

A

The cells burst to release secretion

59
Q

Mammary gland

A

modified apocrine gland secretes milk

60
Q

Ceruminous gland

A

modified apocrine gland secretes cerumen in external ear canal

61
Q

Cerumen

A

Ear Wax- protect ear canal

62
Q

Pigment that colors brown and black hair

A

Eumelanin

63
Q

Pigment that colors blonde hair

A

Pheomelanin

64
Q

How is red hair pigmented

A

Little eumelanin with a lot of pheomelanin

65
Q

What produces white hair

A

air in the medulla or pigment ceases production

66
Q

Hair bulb

A

takes melanocytes into the medulla for pigment

67
Q

medulla

A

center of hair follicle

68
Q

Hair receptors

A

surround the follicle making it possible to feel anything touching the hair

69
Q

What is the hair of the head?

A

Terminal

70
Q

What is the thin hair on babies(Not newborns)?

A

Vellus

71
Q

What is the hair developed on newborns that falls off easily?

A

Lenugo

72
Q

What does the nail bed display?

A

blood vessels under the skin

73
Q

What are nails?

A

Hard keratin modification of the epidermis that protects the sensitive nail bed

74
Q

What is hair?

A

A special version of epidermis composed of hard keratin sprouting from the dermis

75
Q

Cyanosis

A

Bluish tint to the skin caused by lack of oxygen or heat

76
Q

Erythema

A

Reddening of the skin

77
Q

Jaundice

A

Yellow tint to the skin caused by a buildup of pigment that the liver is supposed to break down

78
Q

Pallor

A

Paleness of the skin sometimes caused by shock

79
Q

Hematoma

A

collection of blood under the skin (bad bruise)

80
Q

What is the Hypodermis

A

Lipids (adipose tissue)

the subcutaneous layer

81
Q

What are the layers of the Dermis

A

Areolar Connective Tissue Proper, Dense Irregular Connective Tissue Proper

82
Q

The Dermis is what percentage of skin?

A

It is 80% of skin.

83
Q

Abrasion

A

superficial wound

84
Q

Incision

A

wound with sharp, clean edges

85
Q

Laceration

A

wound with jagged edges

86
Q

Avulsion

A

wound with loss of a complete body part

87
Q

Puncture

A

Long skinny wound going through skin and potentially muscle

88
Q

Contusion

A

Bruise causing bleeding in the dermis