Which statement(s) correctly describe(s) the role of hormones in calcium metabolism? Be aware that all statements may be correct. Which statement(s) correctly describe(s) the role of hormones in calcium metabolism? Be aware that all statements may be correct. Intestinal absorption of calcium depends on the level of active vitamin A that we have in our body. Parathyroid hormone and calcitonin stimulate calcium reabsorption by the kidneys. Calcitonin is released when blood calcium levels are high and increases the activity of osteoclast cells in bone, releasing calcium from bone into the blood. Parathyroid hormone is released when dietary calcium levels are low.

Parathyroid hormone is considered to be a vital hormone involved in regulating the calcium levels of the body. The hormone is secreted by parathyroid glands which are located behind thyroid glands in neck region. This hormone regulates the calcium level of the body by putting its action through bones, intestine and kidneys.

In actual there is a negative feedback system in the body through which parathyroid levels are controlled. When calcium levels in the blood get very low, the gland is stimulated to secrete more parathyroid hormone while when calcium is very high in the blood, it prevent the release of parathyroid hormone.

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