parathyroid hormone

Parathyroid hormone (PTH), or parathormone, is secreted by the parathyroid glands as a polypeptide containing 84 amino acids. It acts to increase the concentration of calcium in the blood, whereas calcitonin (a hormone produced by the parafollicular cells (C cells) of the thyroid gland) acts to decrease calcium concentration. PTH acts to increase the concentration of calcium in the blood by acting upon parathyroid hormone receptor in three parts of the body: FunctionsEffects on serum calcium (raising)Effects on serum phosphate (decrease, with compensation) PTH reduces the uptake of phosphate from the distal tubules of the kidney. which means more phosphate is excreted through the urine.
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Parathyroid hormone n. Abbr. PTH A peptide hormone produced by the parathyroid glands that regulates the amount of calcium in the body. [more]Parathyroid hormone - Community and Resources

Noun
1. hormone synthesized and released into the blood stream by the parathyroid glands; regulates phosphorus and calcium in the body and functions in neuromuscular excitation and blood clotting
(synonym) parathormone
(hypernym) hormone, endocrine, internal secretion

See Parathormone.

[PA-ruh-THY-royd HORE-mone]
A substance made by the parathyroid gland that helps the body store and use calcium. Also called parathormone, parathyrin, or PTH.