Question

Which hormone is responsible for altered serum calcium concentrations? Select all that apply. One, some, or all responses may be correct.

1 Calcitonin

2 Thyroxine

3 Glucocorticoids

4 Growth hormone

5 Parathyroid hormone

Answer 1

Answer: calcitonin and parathyroid hormone

Explanation: calcitonin decreases the serum calcium concentration if it increases above the normal level. PTH increase and stimulate bones to promote osteoclastic activity and release calcium into the blood in response to low serum calcium levels.

Answer 2

Calcitonin, Parathyroid hormone, and Glucocorticoids are responsible for altered serum calcium concentrations.

Step-by-step explanation:

The hormones that are responsible for altered serum calcium concentrations are: Calcitonin, Parathyroid hormone, and Glucocorticoids.

Calcitonin is released from the thyroid gland in response to elevated blood levels of calcium. It increases the activity of osteoblasts, which remove calcium from the blood and incorporate it into the bone.

Parathyroid hormone (PTH) is produced by the parathyroid glands in response to low blood calcium levels. PTH increases blood calcium concentrations by enhancing reabsorption of calcium by the kidneys, stimulating osteoclast activity, and enhancing calcium absorption by the digestive system. Glucocorticoids also play a role in calcium metabolism, but their effects on serum calcium concentrations are more indirect.