PTH (parathyroid hormone) regulates calcium levels in the body through various mechanisms in bones, kidneys, and intestines.
PTH (parathyroid hormone) functions to increase blood calcium levels. It stimulates osteoclasts in the bones to release calcium, inhibits osteoblasts to reduce calcium deposition in bones, triggers increased reabsorption of calcium in the kidneys, and promotes the formation of calcitriol (active form of vitamin D) in the kidneys, enhancing dietary calcium absorption in the intestines.
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