Question

Calcitonin

• A. Elevates potassium level in blood
• B. Lowers calcium level in blood
• C. Elevates calcium level in blood
• D. No effect on calcium

Answer 1

The correct option is B Lowers calcium level in blood

Calcitonin is a polypeptide hormone which is made up of 32 amino acids. It is secreted by the parafollicular cells of the thyroid gland. It is secreted when the calcium level is above the normal range in the blood. It lowers the calcium level in the blood by increasing the re-absorption of calcium in the bone, preventing the activity of osteoclasts and reducing the re-absorption of calcium in the kidneys and the intestines. In this way in control the calcium level in the blood.

So, the correct answer is option B.