Which of the following is true of the hormone parathormone?
A. Parathormone decreases the intestinal absorption and renal reabsorption of calcium ions.
B. Parathormone is secreted by the thyroid gland.
C. Parathormone is the primary regulator of calcium balance.
D. Parathormone is secreted in response to hypercalcemia.
Answer: C
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