How does calcitonin act to lower blood calcium?

A) Increases osteoblast break down of bone matrix, increases calcitriol production, increases intestinal absorption, and decreases renal excretion
B) Increases osteoclast break down of bone matrix, decreases calcitriol production, increases intestinal absorption, and decreases renal excretion
C) Decreases osteoblast break down of bone matrix, increases calcitriol production, increases intestinal absorption, and decreases renal excretion
D) Decreases osteoclast break down of bone matrix, decreases calcitriol production, decreases intestinal absorption, and increases renal excretion
E) Increases endochondral ossification


Answer: D

Anatomy & Physiology

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