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Flashcards in Integument Deck (26):
1

sebaceous gland

secretes waxy oil around hair to protect against brittling
inhibit bacterium
-connected to hair follicle

2

ceruminous glands

ducts empty onto external ear canal
-secretes cerumen (wax) and sebaceous
-protects against bacteria

3

melanin

shades the nucleus to protect from UV radiation

4

carotene

yellow-orange pigment

5

albinism

inability to synthesize tyrosinase

6

arector pili muscle

attached to the hair root and causes hair to stand on end

7

hair contains

shaft (projects out of the skin) and root (part underneath the skin)

8

bulb

part where hair connects to the CT layer

9

papilla of the hair

nipple like area where blood vessels go into the bulb of the hair

10

hair contains four main layers, they are

medulla
cortex
cuticle
follicle layer (internal and external root sheath

11

hair matrix

where mitosis of hair cells is taking place and the coloring of the hair

12

three stages of hair growth

1. growth stage
2. regression
3. rest stage

13

lanugo

peach fuzz that is present on newborns

14

eponychium

cuticle

15

hyponychium

underside of nail

16

nail matrix

part underneath the nail proximal to the eponychium, in which mitosis is taking place

17

purpose of vitamin D

1. gut to absorb calcium from foods
2. kidney to regulate how much calcium to secrete or maintain
3. calcium complex in bone

18

final product of vitamin D

1,25 dihydroxyvitamin D3

19

inflammation stage of wound healing

-blood clot forms
-clean up debris, microbes, dead tissue
-increased vasodilation and capillary permeability
-inundated with neutrophils anad macrophages

20

intermediate substance of vitamin D that is synthesized by the liver and kidney

calcitriol

21

what are the four stages of wound healing?

1. inflammation
2. migratory
3. proliferative
4. maturation

22

what is the process of the inflammatory response in wound healing?

fibrin forms a clot
vasodilation and capillary permeability
neutrophils clean up debris and foreign bodies

23

what is the migratory phase of wound healing?

basal cells move into form basal layer
fibroblasts begin to lay down collagen and glycoproteins
angiogenesis and vessel repair

24

granulation tissue

healing wounded tissue

25

what happens in the proliferative phase of wound healing?

growth of epithelial cells below scab
random pattern of collagen growth

26

what happens in maturation phase of wound healing?

collagen fibers become organized
fibroblasts decrease in number
blood vessels are normal, but fewer

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