Which of the gland secretes calcitonin for regulation of calcium metabolism?
Calcitonin is produced by the parafollicular cells of the thyroid gland, which are also known as the clear or C cells. Its secretion is increased when the thyroid gland is exposed to a plasma calcium level of approximately 9.5 mg/dL. The actions of calcitonin are sho-lived because it has a half-life of less than 10 min in humans. Ref: Barrett K.E., Barman S.M., Boitano S., Brooks H.L. (2012). Chapter 21. Hormonal Control of Calcium & Phosphate Metabolism & the Physiology of Bone. In K.E. Barrett, S.M. Barman, S. Boitano, H.L. Brooks (Eds), Ganong's Review of Medical Physiology, 24e.
Thyroid gland
Parathyroid gland
Both of the above
None of the above