Chapter 17 :: Cutaneous Photobiology Flashcards
1
Q
Ultraviolet B
A
290 nm-315 nm
2
Q
UVB
A
Delayed melanogenesis (peaks at 3 days)
Penetrates no deeper than the upper dermis
Role in vitamin D production
3
Q
vitamin D upper limit
A
10,000 IU daily is considered a safe upper limit for adult intake
4
Q
chromophore that absorbs UVB and initates synthesis of vitamin D
A
7-dehydrocholesterol
5
Q
chromophore for the sunburning reaction
A
DNA
6
Q
chromophore for UVR-induced tanning
A
DNA
7
Q
Fitz Type III
A
Sometimes burns, can tan without orior burn