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When blood calcium levels are too high, calcitonin is one hormone that released.  When blood calcium levels...

When blood calcium levels are too high, calcitonin is one hormone that released.  When blood calcium levels fall too low, PTH is released.  What is the body doing in this case?  What is this a description of?  Be specific and detailed.

Science   Anatomy-And-Physiology   
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The calcitonin hormone is released from the thyroid gland in response to the high serum calcium levels, and maintain the calcium back to its normal value via decreasing the absorption of calcium nutrients within small intestine, and also enhance the process of bone formation.

But when the calcium levels decreased too low in the blood, the parathormone or PTH secreted from the parathyroid gland, and stimulates the osteoclast cells of the bones to increase bone resorption. Parathyroid hormone also increase the absorption of calcium nutrient within the small intestine to maintain the serum calcium levels back to its normal range.

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