The hormone that decreases the blood calcium level is:
A)thyroxine
B)PTH
C)calcitonin
D)insulin

Question

Quizplus · Accepted Answer

Calcitonin is the hormone secreted by the thyroid gland that decreases the blood calcium levels by inhibiting the activity of osteoclasts, the cells responsible for breaking down bone tissue and releasing calcium into the blood. This action increases the deposition of calcium into the bones, ultimately leading to a decrease in blood calcium levels. Thyroxine (A) has a variety of functions, including regulation of metabolism, and does not have a direct role in calcium homeostasis. PTH (B) and vitamin D are the hormones that increase the blood calcium level by promoting the release of calcium from bones and enhancing the absorption of calcium from the intestines, respectively. Insulin (D) is a hormone secreted by the pancreas that regulates glucose levels in the blood, and does not have a direct effect on calcium levels.

The Hormone That Decreases the Blood Calcium Level Is