Please read the following scenario to answer the following question(s).
Osteoporosis is a disease characterized by loss of bone mass and an increased susceptibility to bone fractures. It threatens more than half of all Americans over the age of 50. Women are about four times more likely to suffer from the disease than men. Osteoporosis may progress undetected until bones become so weak that they break during common activities. Prevention of osteoporosis includes regular weight-bearing exercise, recommended intake of calcium and vitamin D, and avoidance of smoking and excessive alcohol.
-In the human body,calcium levels are regulated by the ______.
A) antagonistic actions of calcitonin and parathyroid hormone
B) antagonistic actions of insulin and glucagon
C) interactions of follicle-stimulating hormone and luteinizing hormone
D) interactions of glucocorticoids and androgens

Question

Quizplus · Accepted Answer

Calcium levels in the human body are regulated by the antagonistic actions of calcitonin and parathyroid hormone. Calcitonin reduces calcium levels in the blood by inhibiting bone resorption and increasing calcium excretion by the kidneys. Parathyroid hormone, on the other hand, increases calcium levels in the blood by stimulating bone resorption and decreasing calcium excretion by the kidneys. Both hormones work together to maintain calcium homeostasis in the body.

Please Read the Following Scenario to Answer the Following Question(s)