Question

Hormone that decreases the calcium level in blood is

• A. Thyroxine
• B. Parathormone
• C. Thyrocalcitonin
• D. None of the above

Answer 1

The correct option is C Thyrocalcitonin

Thyrocalcitonin is a hormone secreted by thyroid gland that plays an important role in the calcium metabolism. It is polypeptide hormone secreted by the 'C' cells of the thyroid gland. It is secreted when calcium level is high in the blood. It reduces the calcium levels in the blood by promoting bone formation by the osteoblasts and by inhibiting renal tubular reabsorption of calcium. It has the antagonistic effect of parathyroid hormone.