In human physiology, which hormone promotes calcium deposition into bone matrix and lowers blood calcium levels?
Answer and explanation
Correct answer: B. Calcitonin (secreted by thyroid C-cells)
- Step 1: Calcitonin inhibits osteoclast bone resorption, lowering elevated serum calcium levels. Answer: Calcitonin (secreted by thyroid C-cells). Why not the others: Parathyroid hormone (PTH) raises blood calcium by stimulating osteoclast activity and renal reabsorption.
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