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Please explain how alterations in parathyroid hormone, vitamin D, and calcitonin affect calcium balance.

Please explain how alterations in parathyroid hormone, vitamin D, and calcitonin affect calcium balance.

Science   Anatomy-And-Physiology   
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Answer :parathyroid hormone is released when the concentration of cailcium in our blood decreases PTH mainly act on bone Result in osteolysis of bone take place due to which cailcium ion in blood increses and vice versa

Vitamin D Mainly acts in the calcium transport system in the intestine and kidneya And active extrusion of calcium against a concentration gradient into blood via a Vitamin D-dependent calcium pump. When concentration of cailcium in the bloodstream increses Therefore, the inhibition of the osteoclasts by calcitonin directly reduces the amount of calcium released into the blood and maintain cailcium level homeostasis ...... Thanks

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