What is the mechanism by which the parathyroid glands maintain calcium homeostasis?
A) They secrete parathyroid hormone (PTH), which promotes calcium storage in the intestines.
B) They produce a hormone that, with calcitonin, takes calcium from the bones and promotes calcium absorption by the intestines.
C) They stimulate the pituitary to produce PTH and calcitonin, which elevates serum calcium levels.
D) They secrete hormones that stimulate the production of calcium in the bones and small intestines when serum calcium levels fall below 4.5 mg/dL.

Question

Quizplus · Accepted Answer

The parathyroid glands secrete PTH,an antagonist to calcitonin.Both PTH and calcitonin work together to maintain calcium homeostasis by increasing calcium removal from storage in bone and increasing absorption of calcium by the intestines.When the parathyroid glands do not secrete sufficient amounts of PTH,hypocalcemia may develop.

What Is the Mechanism by Which the Parathyroid Glands Maintain