Thyroxine /thyroxine/ (T4) ( thi-roksin ) an iodine-containing hormone secreted by the thyroid gland, occurring naturally as l-thyroxine; its chief function is to increase the rate of cell metabolism. It is deiodinated in peripheral tissues to form triiodothyronine, which has greater biological activity.
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Thyroxine-binding prealbumin bound to a small fraction of circulating T4. This is the only known function of prealbumins.
It is deiodinated in peripheral tissues to form triiodothyronine (T3 which has a greater biological activity. Thyroxine acts as a catalyst in the body and influences a great variety of effects, including metabolic rate (oxygen consumption growth and development; metabolism of carbohydrates, fats, proteins, electrolytes, and water; vitamin requirements; reproduction; and resistance to infection.
Thyroxine (T 4 ) Thyroid hormone that regulates many essential body processes. thyroxine; T4 natural secretion of thyroid gland (also produced synthetically for treatment of underactive thyroid converted in muscle/liver/kidney to active triiodothyronine (T3) thyroxine, thyroxin ( th-rok'sn, -sin ) The active iodine compound existing normally in the thyroid gland and extracted therefrom in crystalline.
Thyroxine is formed by the molecular addition of iodine to the amino acid tyrosine while the latter is bound to the protein thyroglobulin. Excessive secretion of thyroxine in the body is known as hyperthyroidism, and the deficient secretion of it is called hypothyroidism.
Alternative titles: 3,5,3,5 -tetraiodothyronine; L-tetraiodothyronine; L-thyroxine; T4 Thyroxine, also called 3,5,3,5-tetraiodothyronine, or T4, one of the two major hormones secreted by the thyroid gland (the other is triiodothyronine). Thyroxines principal function is to stimulate the consumption of oxygen and thus the metabolism of all cells and tissues in the body.
This hormone production system is regulated by a negative feedback loop so that when the levels of the thyroid hormones, thyroxine and triiodothyronine increase, they prevent the release of both thyrotropin -releasing hormone and thyroid stimulating hormone. This
Thyroxine (T4) throksn a hormone of the thyroid gland, derived from tyrosine and deiodinated in the periphery to T3 (triiodothyronine) that stimulates metabolic rate. Also called tetraiodothyronine. thyroxine T4, 3,5,3 5'-Tetraiodothyronine A hormone that stimulates metabolism and O2 consumption, which is secreted by the thyroid gland in response to TSHthyrotropin produced in the adenohypophysisanterior pituitary.
Thyroxine (throksin), n the hormone secretion of the thyroid gland, L-3,5,3,5-tetraiodothyronine. thyroxine, thyroxin a hormone of the thyroid gland that contains iodine and is a derivative of the amino acid tyrosine.
T4 is deiodinated in peripheral tissues to form tri-iodothyronine (T3 which has a greater biological activity. Thyroxine acts as a catalyst in the body and influences a great variety of effects, including metabolic rate (oxygen consumption growth and development; metabolism of carbohydrates, fats, proteins, electrolytes and water; vitamin requirements; reproduction; and resistance to infection.
What is thyroxine? Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It is the inactive form and most of it is converted to an active form called triiodothyronine by organs such as the liver and kidneys.
The chemical structure of thyroxine is.
Hypothalamus secretes thyrotropin-releasing hormone which, in turn, stimulates the pituitary gland to produce thyroid stimulating hormone. This hormone stimulates the production of the thyroid hormones, thyroxine and triiodothyronine, by the thyroid gland.
A preparation of thyroxine, levothyroxine, is used pharmaceutically. thyroxine (th-rksn, -sn) or thyroxin (-rksn) n. Abbr. T4 An iodine-containing hormone that is produced by the thyroid gland, increases the rate of cell metabolism, regulates growth, and is made synthetically for treatment of thyroid disorders.