Fat Soluble Vitamins

Question 1

What vitamin is a retinoid?

Answer 1

vitamin A (retinol)

Question 2

Retinoids are necessary for what 4 things?

Answer 2

• vision
• reproduction
• growth
• epithelial tissue maintenance

Question 3

What does retinol get oxidized to?

Answer 3

retinoic acid

Question 4

What is the function of reinoic acid?

Answer 4

it binds to chomatin, activating transcription of specific genes

Question 5

Night blindness and xeropthalmia (corneal dryness that leads to blindness) are caused by what vitamin deficiencies?

Answer 5

vitamin A

Question 6

Large amounts of vitmain A are toxic and result in _____.

Answer 6

hypervitaminosis A

Question 7

True or False? Good sources of retinol are butter and egg yolk?

Answer 7

True

Question 8

What are good sources of carotenes?

Answer 8

yellow and dark green vegetables

Question 9

1,25-dihydroxylcholecalciferol is the active form of what vitamin?

Answer 9

vitamin D

Question 10

What vitamin is responsible for calcium uptake?

Answer 10

vitamin D

Question 11

Rickets and osteomalacia are deficiencies of what vitamin?

Answer 11

vitmain D

Question 12

What decreases blood calcium by inhibiting mobilization from bone, absorption from intestine, and resorption by the kidney?

Answer 12

calcitonin, a thyroid hormone

Question 13

Calcitonin opposed what?

Answer 13

PTH (parathyroid hormone)

Question 14

Phylloquinone from plants and menaquinone from intestinal bacterial flora are forms of what vitamin?

Answer 14

vitamin K

Question 15

What vitamin functions in carboxyaltion of glutamic acid residues in post-translational modification of blood clotting factors?

Answer 15

vitamin K

Question 16

What vitamin deficiency is common in unsupplemented newborns and cause bleeding?

Answer 16

vitamin K

Question 17

What vitamin’s active form can be several forms but its most active form is alpha-tocopherol?

Answer 17

vitamin E

Question 18

What vitamin functions as an antioxidant?

Answer 18

vitamin E

Question 19

What vitamin deficiency can lead to RBC fragility and hemolytic anemia?

Answer 19

vitamin E

Question 20

True or False? Clinical trials have failed to show a definitive benefit from supplements of vitamin A,C, or E for the prevention of cancer or cardiovascular disease.

Answer 20

True