Question

What is the primary function of the Parathyroid hormone?

A) stimulates osteoclast activity
B) increases the rate of calcium absorption
C) decreases the rate of calcium excretion
D) stimulates osteoclast activity and decreases the rate of calcium excretion only
E) does all of these

Answer 1

The primary function of the Parathyroid hormone (PTH) is to stimulate osteoclast activity and increase blood calcium concentrations. PTH enhances reabsorption of calcium by the kidneys, stimulates osteoclasts to break down bone matrix and release calcium into the blood, and stimulates the synthesis and secretion of calcitriol, which enhances calcium absorption by the digestive system. PTH plays a key role in maintaining calcium homeostasis in the body.

Step-by-step explanation:

The primary function of the Parathyroid hormone (PTH) is to stimulate osteoclast activity and increase blood calcium concentrations. PTH enhances reabsorption of calcium by the kidneys, stimulates osteoclasts to break down bone matrix and release calcium into the blood, and stimulates the synthesis and secretion of calcitriol, which enhances calcium absorption by the digestive system. PTH plays a key role in maintaining calcium homeostasis in the body.