Calcitonin Causes

Question

Calcitonin causes
A) an increase in the blood concentration of calcium
B) a breakdown in the bone matrix
C) a decrease in the blood concentration of calcium
D) both a and b above

Accepted Answer

Calcitonin causes a decrease in the blood concentration of calcium by inhibiting osteoclast activity and promoting calcium deposition in bones, thus lowering serum calcium levels. It does not cause an increase in the blood concentration of calcium or breakdown of bone matrix.