Vit.D Flashcards
1
Q
Where is it made?? And from what?
A
The skin from cholesterol with exposure to UV light
2
Q
It is inactivated until modified in what
A
liver and kidneys
3
Q
Role
A
Maintains normal blood
calcium levels by:
1. Promotes calcium absorption in GI tract
2. Increase bone breakdown to raise blood calcium
3. Stimulates calcium 3 retention in kidneys
AND
Helps control gene expression (role in immunity)
4
Q
Sources
A
limited (milk, egg yolk, liver)
5
Q
Def.
A
Rickets (deformed bones) in
children
AND
Osteomalacia (weak bones) in adults
6
Q
Excess
A
Causes high calcium (e.g. calcium stones), and cardiovascular damage
