Medical MCQs

5099 MCQs  (Page 43 of 510)

Vitamin D_____________?
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
1st clinical sign of vitamin A deficiency is_____________?
A. Night blindness
B. Bitot’s spots
C. Xerostomia
D. Conjunctival xeroses
Most of vitamin B12 in the body is stored as_____________?
A. Methyl b12
B. Hydroxy b12
C. Cyano cobalamine
D. None of the above
Which of the following is not true of Vit D_______________?
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