Which process is responsible for decreasing serum calcium when calcium intake greatly exceeds renal excretion capacity?

💡 Explanation

Calcitonin secretion increases when serum calcium levels are high; because of this hormonal response, osteoblast activity increases and osteoclast activity decreases to deposit calcium into bone mineral. Therefore, calcitonin is the answer, rather than PTH or vitamin D, which elevate serum calcium.

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