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Body Fluids and Circulations
Question
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Calcitonin is a thyroid hormone which

  • Elevates potassium level in the blood

  • Lowers calcium level in a blood

  • Elevates calcium level in the blood

  • Has no effect on calcium

Answer

B.

Lowers calcium level in a blood

Calcitonin is a polypeptide hormone which lowers calcium and phosphate levels of plasma by inhibiting bone degradation and stimulating their uptake by bone. Parathyroid hormone elevates calcium level in blood.

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