Parathyroid hormone (PTH), parathormone or parathyrin, is secreted by the chief cells of the parathyroid glands as a polypeptide containing 84 amino acids. It acts to increase the concentration of calcium (Ca2+) in the blood, whereas calcitonin (a hormone produced by the parafollicular cells (C cells) of the thyroid gland) acts to decrease calcium...
A substance made by the parathyroid gland that helps the body store and use calcium. A higher-than-normal amount of parathyroid hormone causes high levels of calcium in the blood and may be a sign of disease. Also called parathormone, parathyrin, and PTH.
(PTH) An 84-amino acid peptide hormone secreted by the parathyroid gland in response to low levels of calcium in the blood. Parathyroid hormone (PTH) acts to maintain normal levels of blood calcium by: • increasing the number of osteoclasts, cells that break down the bone ...
<hormone> A peptide hormone of 84 amino acids (9402 D). Stimulates osteoclasts to increase blood calcium levels, the opposite effect to calcitonin. ... (18 Nov 1997) ... 
(PTH) a polypeptide hormone secreted by the parathyroid glands; it influences calcium and phosphorus metabolism and bone formation.
A polypeptide hormone secreted by the parathyroid glands. It activates osteoclasts and inhibits osteoblasts.
A polypeptide hormone secreted by the parathyroid glands. It activates osteoclasts and inhibits osteoblasts.
See parathormone.
(PTH) Type: Term Definitions: 1. a peptide hormone formed by the parathyroid glands; it raises the serum calcium levels when administered parenterally by causing bone resorption, reducing renal clearance of calcium and increasing efficiency of calcium absorption in the intestine. It acts in conjunction with calcitonin and other h...
Parathyroid hormone: See Parathormone.
(PTH) A polypeptide hormone secreted by the parathyroid glands. PTH acts to raise the blood Ca++ levels primarily by stimulating reabsorption of bone.
[n] - hormone synthesized and released into the blood stream by the parathyroid glands
a hormone released by the parathyroid glands that plays a role in controlling calcium levels in the blood 
parathormone noun 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