Question

Parathormone influences calcium absorption in small intestine by regulating metabolism of

• A. Vitamin C
• B. Vitamin D
• C. Vitamin B
• D. Enterogastrone

Answer 1

The correct option is B Vitamin D

Parathormone is secreted from the parathyroid hormone and increases blood calcium level by increasing the reabsorption of calcium from the bones. Parathormone increases calcium absorption in small intestine by regulating metabolism of vitamin D because it stimulates osteoclasts. These are the cells that cause breakdown by dissolution of calcium from bone and thus, concentration of calcium is increased in blood.

So, the correct answer is 'Vitamin D'.