Parathyroid Hormone Functions in All of the Following Ways Except

Question

Parathyroid hormone functions in all of the following ways except
A) stimulating osteoclast activity.
B) increasing the rate of calcium absorption.
C) decreasing the rate of calcium excretion.
D) raising the level of calcium ion in the blood.
E) inhibiting calcitonin secretion.

Accepted Answer

Parathyroid hormone (PTH) primarily functions to regulate calcium levels in the blood. It stimulates osteoclast activity, increases calcium absorption from the kidney and intestine, and decreases calcium excretion, thereby raising the level of calcium ions in the blood. It does not directly inhibit calcitonin secretion; calcitonin is a hormone produced by the thyroid gland that works in opposition to PTH to lower blood calcium levels.