Question

Calcitonin is produced by

• A. Follicular cells of the thyroid gland
• B. Parafollicular cells of the thyroid gland
• C. Parathyroid gland
• D. Follicular cells of the ovary

Hint:

Focus on the cell types within the thyroid gland and their respective hormone secretions.

Answer 1

The Correct Option is B

Calcitonin is a peptide hormone secreted by the parafollicular cells (C cells) of the thyroid gland. Its primary function is to regulate blood calcium levels by inhibiting osteoclast activity, thereby reducing bone resorption and lowering calcium concentrations in the bloodstream. This hormone is particularly important in preventing hypercalcemia.