Question

question
when the calcium ion concentration of the blood rises above the normal level, secretion of the hormone calcitonin ____
answer
increases the rate of intestinal absorption
increases the rate of calcium ion excretion from the kidneys
activates the parathyroid gland to release parathyroid hormone
promotes osteoclast activity
i dont know yet

Explanation:

Calcitonin is a hormone that lowers blood - calcium levels. When blood calcium is high, it increases calcium ion excretion from the kidneys to reduce the calcium level in the blood. Intestinal absorption increase would raise calcium levels, parathyroid hormone release is related to low calcium levels, and osteoclast activity increases calcium in the blood.

Answer:

increases the rate of calcium ion excretion from the kidneys