Calcitonin
A)promotes the absorption of calcium from the gastrointestinal tract.
B)promotes osteoclast activity in the bones.
C)reduces calcium excretion by the kidneys.
D)reduces extracellular calcium ion levels.
E)increases blood calcium levels.

Question

Quizplus · Accepted Answer

Calcitonin reduces extracellular calcium ion levels by inhibiting osteoclast activity in the bones and promoting calcium secretion by the kidneys. It does not promote the absorption of calcium from the gastrointestinal tract or increase blood calcium levels, as the other answer choices suggest.