lecture 23: fat soluble Flashcards Preview

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Flashcards in lecture 23: fat soluble Deck (18):
1

how many active forms of vitamin A are in the body? what are they?

3
Retinol
Retinal
Retinoic acid

2

what are carotenoids?

organic pigments in plants that can be converted to vitamin A

3

what is vitamin A important for?

vision
immunity
epithelial integrity
bone remodeling
reproduction

4

what is retinoic acid important for?

cell proliferation and differentiation

5

what are symptoms of vitamin A deficiency?

blindness (particularly @ night)
corneal ulcerations
skin hyperkeratosis
impaired immunity
diarrhea

6

what is vitamin A toxicity associated with?

teratogenic effects (fetal malformation)
bone demineraliztion

7

what are the 3 forms of vitamin D?

cholecalciferol
ergocalciferol
calcitriol

8

what is the active form of vitamin D called?

calcitriol

9

what are functions of vitamin D?

calcium homeostasis
bone formation
possibly other diseases

10

what diseases are associated with vitamin D deficiency?

rickets (children)
osteoporosis and osteomalacia
autoimmune diseases

11

what are symptoms of vitamin D toxicity?

hypercalcemia
calcification of soft tissues
kidney stones
N/V
loss of bone mineral density
joint pain

12

what are symptoms of vitamin E deficiency?

neuropathy, ataxia
myopathy
retinopathy
hemolytic anemia

13

how do vitamin E and vitamin K relate?

vitamin E interferes with itamin K function

14

what is the function of vitamin K?

blood clotting
bone health

15

what are symptoms of vitamin K deficiency?

excessive bleeding

16

what are the functions of vitamin E?

antioxidant

17

what does absorption of fat soluble vitamins into intestine require?

bile + micelle formation

18

what toxicity is associated with vitamin K?

none - readily excreted