About The Medical Condition Parathyrin
Find the definition of the medical term Parathyrin. Parathyrin defined and explained for easy understanding at the Medical Conditions from ClusterMed.info.
Parathyrin
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What's The Definition Of The Medical Condition Parathyrin?
Polypeptide hormones (84 amino acid residues) secreted by the parathyroid glands, which promote release of calcium from bone to extracellular fluid by activating osteoblasts and inhibiting osteoclasts, indirectly promote increased intestinal absorption of calcium, and promote renal tubular reabsorption of calcium and increased renal excretion of phosphates. It is a major regulator of bone metabolism. Secretion of parathyroid hormone increases when the level of calcium in the extracellular fluid is low. Its action is opposed by calcitonin. (Dorland, 28th ed)
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