The action of parathyroid hormone is counteracted by
A) thyroxin.
B) calcitonin.
C) oxytocin.
D) GH.

Question

Quizplus · Accepted Answer

Calcitonin is a hormone produced by the thyroid gland that lowers blood calcium levels, which opposes the action of parathyroid hormone (PTH) that increases the blood calcium levels. Thyroxin regulates metabolism, oxytocin stimulates uterine contractions and milk ejection, and GH stimulates growth and protein production, but none of these hormones have a direct role in counteracting the action of PTH.

The Action of Parathyroid Hormone Is Counteracted by