Vitamins

A. Its active form is calcitriol
B. Increase calcium absorption from the intestines
C. Its deficiency results in rickets
D. Its decrease cause phosphate reabsorption from the kidneys

A. Methyl B12
B. Hydroxy B12
C. Cyano cobalamine
D. None of the above

A. Riboflavin
B. Thiamine
C. Pyridoxine
D. Pantothenic acid

A. Eye
B. Kidneys
C. Testes
D. Adrenal cortex

A. Folic acid
B. Niacinamide
C. Pyridoxine
D. Cyano cobolamine

A. Vit E
B. Folic acid
C. Thiamine
D. Cobalamine

A. B6 ad B12
B. B12 and nicotinamie
C. Folic acid and B6
D. Folic acid and B12

A. Chromium
B. Iron
C. Iodine
D. Selenium

A. night blindness
B. bitot’s spots
C. xerostomia
D. conjunctival xeroses

A. Absorption requires bile pigments
B. Synthesis is regulated at the reaction catalyzed by 15-hydroxylase
C. Deficiency on adults leads to rickets
D. Along with PTH, increases calcium resorption from bone