Which hormone exerts antagonistic action to PTH (parathyroid hormone)?
A)thyroxine
B)epinephrine
C)growth hormone
D)calcitonin
E)glucagon

Question

Quizplus · Accepted Answer

Calcitonin is a hormone that opposes the action of parathyroid hormone (PTH) by decreasing blood calcium levels. PTH promotes calcium release from bone, reabsorption of calcium in the kidneys, and activation of vitamin D, all of which raise blood calcium levels. Calcitonin, on the other hand, inhibits bone resorption, decreases calcium reabsorption in the kidneys, and decreases the formation of vitamin D, which all lead to decreased blood calcium levels. Therefore, calcitonin and PTH have antagonistic actions.

Which Hormone Exerts Antagonistic Action to PTH (Parathyroid Hormone)