Vitamin D: Chemistry, Functions and Disorders
Renal osteodystrophy’ is an alternative name for:
Rickets
Osteomalacia
Renal rickets
Enzymes
Renal rickets
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Target organs for calcitriol, included:A. Intestine
B. Bones
C. Kidney
D. All of above
Biologically active form of vitamin ‘D’ is considered as:
A. Ergosterol
B. Cholecalciferol
C. Calciferol
D. All of above
Ergocalciferol’ is synthesised by:
A. Carotenes
B. Polysaccharides
C. Lipids
D. All of above
Synthesis of calcitriol is:
A. Controlled by vitamin A
B. Self-regulated
C. Controlled by myosin
D. Controlled by vitamin E
Calcitriol’ is synthesized by ultraviolet rays of sunlight in:
A. Muscles
B. Bones
C. Skin
D. Lungs
Action of calcitriol is similar to the:
A. Steroid hormones
B. Growth hormones
C. Epinephrine
D. Intestinal hormones
Both sterols i.e. Ergocalciferol and cholecalciferol, having:
A. extra double bond
B. methyl group
C. hydroxyl group
D. All of above
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