The hormone that helps to prevent hypercalcemia by depositing excess calcium in bones is?

The hormone that helps to prevent hypercalcemia by depositing excess calcium in bones is calcitonin. Calcitonin is produced by the parafollicular cells (C cells) of the thyroid gland and plays a crucial role in regulating calcium levels in the blood. When calcium levels are elevated, calcitonin is secreted to lower these levels by reducing the amount of calcium released from bones into the bloodstream. It encourages the uptake of calcium by the bone, thus promoting bone formation and mineralization. This action counteracts hypercalcemia — a condition characterized by excessively high levels of calcium in the blood.

Other hormones mentioned, such as parathyroid hormone, work to raise blood calcium levels rather than decrease them. Vitamin D is involved in the absorption of calcium in the intestines and also has an indirect role in raising calcium levels, while insulin primarily regulates glucose metabolism and has no direct role in calcium homeostasis. Therefore, calcitonin is the specific hormone that addresses the prevention of hypercalcemia by facilitating the deposition of excess calcium into the bones.