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