Question

which two hormones closely control levels of calcium in the blood?
t3 and t4
acth and aldosterone
calcitonin and parathyroid hormone
epinephrine and norepinephrine

Explanation:

Calcitonin decreases blood - calcium levels by promoting calcium deposition in bones. Parathyroid hormone increases blood - calcium levels by promoting bone resorption, calcium reabsorption in the kidneys, and activation of vitamin D for increased intestinal calcium absorption. T3 and T4 regulate metabolism, ACTH and aldosterone are related to the adrenal gland and stress - related functions, and epinephrine and norepinephrine are involved in the body's stress response.

Answer:

Calcitonin and parathyroid hormone