Skin and Nails Flashcards
1
Q
how is Vitamin D produced
A
- sunlight (UVB radiation) converts pre-vitamin D3 to vitamin D3
- liver converts to calcidiol
- kidney converts to calcitriol - vitamin D
2
Q
what happens in hyperthermia
A
- thermoreceptors signal to hypothalamus
- causes vasodilation of periferal blood cells and
- sweating
- body temperature returns to normal
3
Q
what happens in hypothermia
A
- thermoreceptors signal to hypothalamus
- causes vasoconstriction, shivering
- suprarenal medulla produces epinephrin and norepinephrin, to raise metabolic rate
- TRH and TSH stimulates production of T3 and T4, raising metabolic rate
- body temperature returns to normal
4
Q
what is the role of the hyodermis
A
- protective cushion
- insulator
- water and energy store
5
Q
where are meisnners corpuscles located
A
papillary region of the dermis
6
Q
where are melanocytes located
A
stratum basale of the epidermis
7
Q
what are the 2 types of melanin
A
eumelanin - pink to red
pheomelanin - yellow to black/brown
8
Q
what cells are in the epidermis
A
- kertinocytes
- melanocytes
- merkel cells
- langerhans cells
9
Q
what are the 2 types of granules that mature keratinocytes produce in the stratum granulosum
A
- keratohyaline granules
- lamella granules
10
Q
what are the 3 stages keratinocytes go through
A
- maturation
- keratinisation
- desquamation
11
Q
what are the 2 types of sweat
A
- eccrine - abundant
- apocrine - develop during puberty
12
Q
what are the 4 stages of hair growth
A
- growth: anagen
- regression: catagen
- resting: telogen
- shedding: exogen
13
Q
meissners corpuscles
A
- slip and light touch (RA)
- dermal papillae of hairless skin
messy meissners
14
Q
meissners corpuscles
A
- slip and light touch (RA)
- dermal papillae of hairless skin
messy meissners
15
Q
pacinian corpuscles
A
- RA
- dermis, subcutaneous, muscles
- sense pressure
pacino under pressure! say hello to my lil friend
