Choose the correct answer from the alternatives given.
Which of the following organs secretes calcitonin?

Thyroid

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GIT

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Heart

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Pituitary

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Solution

The correct option is A Thyroid
Calcitonin is a hypocalcemic hormone. This is secreted by the C-cells in the thyroid gland. It acts on bone and the kidney to reduce the blood calcium level. It reduces the reabsorption of calcium from bones and inhibits reabsorption of calcium by the renal tubules.
So the correct answer is the thyroid.

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