Flashcards in Integument Deck (26)
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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
