Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
d. Calcitonin is released in response to an elevated calcium ion concentration in the blood.

Verified step by step guidance

1. Step 1: Understand the role of calcitonin in calcium homeostasis. Calcitonin is a hormone produced by the thyroid gland that helps regulate calcium levels in the blood.
2. Step 2: Recall the stimulus for calcitonin release. Calcitonin is released when blood calcium ion concentration is elevated, as its primary function is to lower calcium levels by inhibiting osteoclast activity and promoting calcium deposition in bones.
3. Step 3: Evaluate the statement provided. The statement 'Calcitonin is released in response to an elevated calcium ion concentration in the blood' aligns with the physiological role of calcitonin.
4. Step 4: Determine whether the statement is true or false. Based on the explanation above, the statement is true.
5. Step 5: If the statement were false, correct it by stating the accurate physiological role of calcitonin. However, in this case, no correction is needed as the statement is true.

Key Concepts

Calcitonin Function

Calcitonin is a hormone produced by the thyroid gland that helps regulate calcium levels in the blood. It is released in response to elevated calcium ion concentrations, promoting the deposition of calcium in bones and reducing calcium absorption in the intestines and kidneys.

Calcium Homeostasis

Calcium homeostasis refers to the mechanisms that maintain stable levels of calcium in the bloodstream. This balance is crucial for various physiological functions, including muscle contraction, nerve transmission, and blood clotting, and involves hormones like calcitonin and parathyroid hormone.

Hormonal Regulation

Hormonal regulation involves the release of hormones to control physiological processes in the body. In the context of calcium levels, calcitonin and parathyroid hormone work antagonistically to ensure that calcium levels remain within a narrow range, highlighting the importance of hormonal feedback mechanisms.