Which of the following is true about calcium homeostasis?
A)Increased calcitonin levels will cause increased blood calcium levels.
B)Parathyroid hormone is the single most important regulator of calcium levels in the blood.
C)High calcium levels cause bone resorption.
D)Parathyroid hormone causes an increase in osteoblast activity.

Question

Quizplus · Accepted Answer

Parathyroid hormone is indeed the single most important regulator of calcium levels in the blood. It increases blood calcium levels by stimulating the release of calcium from bones and increasing the absorption of calcium from the intestines and kidneys. Increased levels of calcitonin, on the other hand, will cause decreased blood calcium levels. High calcium levels actually inhibit bone resorption, and parathyroid hormone causes an increase in osteoclast activity, not osteoblast activity.

Which of the Following Is True About Calcium Homeostasis