Which statement is correct about PTH?
A) When calcium level rises, PTH secretion is activated.
B) When calcium level lowers, PTH secretion is stimulated.
C) PTH has the same effect as calcitonin.
D) PTH inhibits calcium absorption from the gut.
E) PTH decreases the activity of osteoclasts.

Question

Quizplus · Accepted Answer

PTH secretion is stimulated when calcium levels in the blood decrease. This causes PTH to promote the release of calcium from bones and increase calcium absorption from the gut and kidneys. PTH has the opposite effect of calcitonin, which promotes calcium deposition in bones and decreases calcium absorption. It also stimulates the activity of osteoclasts, which are cells that break down bone tissue to release calcium.

Which Statement Is Correct About PTH