What does parathormone regulate?

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(C) Parathormone $(PTH)$,secreted by the parathyroid gland,is a peptide hormone that plays a crucial role in calcium homeostasis. It increases the lev

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Metabolism of calcium and phosphate

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(C) Parathormone $(PTH)$,secreted by the parathyroid gland,is a peptide hormone that plays a crucial role in calcium homeostasis. It increases the levels of calcium ions $(Ca^{2+})$ in the blood by acting on bones (stimulating bone resorption/demineralization),kidneys (increasing reabsorption of $Ca^{2+}$),and the digestive tract (indirectly via vitamin $D$ activation). Simultaneously,it decreases blood phosphate levels by promoting the excretion of phosphate ions in the urine. Therefore,it regulates the metabolism of calcium and phosphate in the body.

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