An increased blood calcium level stimulates the release of:Multiple choice question.calcitriolcalcitoninparathyroid hormone (PTH)

An increased blood calcium level stimulates the release of calcitonin.

Here's a step-by-step explanation:

1. The body maintains a tight control over the calcium levels in the blood.

2. When the blood calcium level increases, the thyroid gland detects this change.

3. In response, the thyroid gland releases a hormone called calcitonin.

4. Calcitonin helps to lower the blood calcium levels by inhibiting the activity of osteoclasts (cells that break down bone to release calcium into the bloodstream) and increasing the activity of osteoblasts (cells that build up bone, thereby removing calcium from the bloodstream).

5. Therefore, the correct answer to the question "An increased blood calcium level stimulates the release of:" is calcitonin.