Which gland primarily produces calcitonin?

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Multiple Choice

Which gland primarily produces calcitonin?

Explanation:
Calcitonin is produced by the thyroid gland, specifically the parafollicular (C) cells. These cells release calcitonin when blood calcium is high, and the hormone lowers calcium levels by inhibiting osteoclast activity in bone and reducing calcium reabsorption in the kidneys. Among the glands listed, only the thyroid contains these C cells and serves as the source of calcitonin. The adrenal gland makes steroids and catecholamines, the thymus supports T cell development, and the pancreas regulates blood glucose with insulin and glucagon.

Calcitonin is produced by the thyroid gland, specifically the parafollicular (C) cells. These cells release calcitonin when blood calcium is high, and the hormone lowers calcium levels by inhibiting osteoclast activity in bone and reducing calcium reabsorption in the kidneys. Among the glands listed, only the thyroid contains these C cells and serves as the source of calcitonin. The adrenal gland makes steroids and catecholamines, the thymus supports T cell development, and the pancreas regulates blood glucose with insulin and glucagon.

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