/kal'si toh"nin/, n. Biochem.
a polypeptide hormone that participates in the regulation of calcium levels in vertebrates by inhibiting loss of calcium from bone to the blood.
[1960-65; CALCI- + TONE + -IN2]

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also called  Thyrocalcitonin,  

      a protein hormone secreted in humans and other mammals by parafollicular cells in the thyroid gland, and in birds, fishes, and other nonmammalian vertebrates by cells of the ultimobranchial bodies, which are discrete calcitonin-secreting glands. Calcitonin lowers the concentration of calcium in the blood when it rises above the normal value. It has the opposite effect of parathyroid hormone (parathormone).

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Universalium. 2010.

Look at other dictionaries:

  • Calcitonin — is a 32 amino acid linear polypeptide hormone that is produced in humans primarily by the parafollicular cells (also known as C cells) of the thyroid, and in many other animals in the ultimobranchial body.[1] It acts to reduce blood calcium… …   Wikipedia

  • Calcitonin — vom Lachs nach PDB  …   Deutsch Wikipedia

  • calcitonin — calcitonin. См. тирокальцитонин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Calcitonin — Calcitonin, Peptidhormon, das bei Säugern in der Schilddrüse, bei Nichtsäugern unter den Wirbeltieren vom Ultimobranchialkörper gebildet wird; senkt den Calcium und Phosphatspiegel und wirkt als Gegenspieler des Parathormons, indem es den… …   Deutsch wörterbuch der biologie

  • calcitonin — [kal΄si tō′nin] n. a polypeptide hormone regulating the balance of calcium and phosphate in the blood by direct action on bone and kidney: in mammals, secreted by the thyroid …   English World dictionary

  • Calcitonin — A hormone produced by the thyroid gland that lowers the levels of calcium and phosphate in the blood and promotes the formation of bone. Bone is in a constant state of remodeling whereby old bone is removed by cells called osteoclast and new bone …   Medical dictionary

  • Calcitonin — КАЛЬЦИТОНИН ( Calcitonin ). Гормон гипокальциемического действия, вырабатываемый парафолликулярными светлыми клетками щитовидной железы и аналогичными клетками вилочковой и паращитовидных желез млекопитающих, животных и человека. По химической… …   Словарь медицинских препаратов

  • Calcitonin — Cal|ci|to|nin [↑ Calc , ↑ ton u. ↑ in (3)], das; s, e; Syn.: Thyreocalcitonin: körpereigenes Peptid Hormon aus 32 Aminosäuren, das als Gegenspieler des Parathyrins den Calciumspiegel im Blut senkt u. damit zur Biomineralisation beiträgt. * * *… …   Universal-Lexikon

  • calcitonin — thyrocalcitonin; n. a hormone, produced by C cells in the thyroid gland, that lowers the levels of calcium and phosphate in the blood. A recombinant form of calcitonin, salcatonin (Miacalcic), is given by injection to treat hypercalcaemia and… …   The new mediacal dictionary

  • calcitonin — A hormone formed by the C cells of the thyroid gland. It helps maintain a healthy level of calcium in the blood. When the calcium level is too high, calcitonin lowers it …   English dictionary of cancer terms

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