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Calcitonin lowers blood calcium by

Correct answer: B. Decreasing bone resorption

  • A. Increasing bone resorption
  • B. Decreasing bone resorption
  • C. Increasing calcium absorption
  • D. Decreasing calcium excretion

Explanation

Calcitonin from the thyroid inhibits osteoclasts, decreasing bone resorption and lowering blood calcium.

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About Chemical Coordination and Hormones

Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.

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