Question

multiple choice question
the opposite effects of ____ (secreted by the thyroid gland) and ____ (secreted by the parathyroid gland) maintain calcium ion homeostasis
o parathyroid hormone (pth); calcitonin
o calcitonin; parathyroid hormone (pth)

Explanation:

Calcitonin is secreted by the thyroid gland and decreases blood - calcium levels. Parathyroid hormone (PTH) is secreted by the parathyroid gland and increases blood - calcium levels. Their opposite effects maintain calcium ion homeostasis.

Answer:

B. calcitonin; parathyroid hormone (PTH)