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問題一覧
1
This layer is well vascularized and connects the skin to the underlying fascia of bones and muscle
hypodermis
2
The hypodermis is responsible for the coloring of the skin, which is called what
pigmentation
3
What colors the skin
melanin
4
This is responsible for the production of melanin
Melanocyte
5
This transports, the melanin in a vesicle from basale to keratinocytes
Melanosome
6
This gives the color black brown to the skin
eumelanin
7
This gives the color red to the skin
pheomelanin
8
it protects the dna of epidermal cells from uv damage, skin color
melanin
9
What happens with too much UV exposure?
skin darkening
10
What happens to too much sun exposure?
wrinkling
11
What destroys the melanosomes after doing its function?
lysosome
12
where will the melanin filled keratocytes be sloughed off
stratum corneum
13
dead keratinized cells
hair
14
The origin of this is at the dermis
hair folicle
15
This is anchored to the hair follicle and is the exposed part
hair shaft
16
below the surface
hair root
17
This surrounds the hair papilla with nerves and blood vessels. It also has hair matrix.
hair bulb
18
what are the mitotically active basal cells called in the hair bulb
hair matrix
19
this is the central core of the hair
medulla
20
layer of compressed keratinized cell, responsible for hair texture.
cortex
21
this covers the cortex , very hard keratinized cells
cuticle
22
These are cuboidal shift stem cell and is a precursor of keratinocytes
basal cell
23
8-10 layers in the epidermis
stratum spinosum
24
3-5 layers in the epidermis
stratum granulosum
25
Stratum corneum layers
15-30 layers
26
stratum granulosum layers
3-5 layers
27
stratum spinosum layers
8-10 layers
28
this surrounds the root of the growing hair and extends to the hair shaft
inner root sheath
29
Extension of the epidermis and encloses the hair root
external root sheath
30
It is a thick, clear, connective tissue sheath covering the hair root and connects to the dermis
glassy membrane
31
protection, sensory input, thermoregulation, communication are functions of a ?
hair
32
What are the three phases of hair growth?
anagen catagen telogen
33
how long does anagen last?
2-7 years
34
How long does catagen last?
2-3 weeks
35
how long does telogen last?
2-4 months
36
This phase is when the cells divide rapidly of the root pushing the hair shaft out
anagen
37
This is the transition period of the hair growth
catagen
38
This is when the hair follicle is at rest
telogen
39
hair growth rate per day
0.3mm
40
how many hairs do we lose and gain every day
50
41
why do we get white hair or gray hair when aging?
decrease melanin production
42
This is affected by hormones or dietary changes are aging
hair loss