thyroxine hormone definition
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- Thyroxine: A hormone that is made by the thyroid gland and is one of the most important thyroid hormones. Four iodine molecules are attached to the molecular structure of thyroxine.Along with the more powerful thyroid hormone triiodothyronine (T3), thyroxine affects almost every process in the body, including body temperature, growth, and heart rate. Also known as T4.our iodine molecules are attached to the molecular structure of thyroxine. Along with the more powerful thyroid hormone triiodothyronine (T3), thyroxine affects almost every process in the body, including body temperature, growth, and heart rate.
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Thyrotropin-releasing hormone Thyrotropin-releasing hormone, also called thyrotropin-releasing factor or thyroliberin, is a releasing hormone, produced by the hypothalamus, that stimulates the release of thyrotropin and prolactin from the anterior pituitary. It is a tropic, tripeptidal hormone. TRH has been used clinically for the treatment of spinocerebellar degeneration and disturbance of consciousness in humans. Its pharmaceutical form is called protirelin.
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triiodothyronine Triiodothyronine is produced mainly from the deiodination of thyroxine in the peripheral tissues but is also synthesized by and stored in the thyroid gland as an amino acid residue of the protein thyroglobulin.riiodothyronine (trī´īō´dōthī´rə-nēn´) , n a hormone that helps regulate growth and development, control metabolism and body temperature, and by a negative-feedback system, inhibit the secretion of thyrotropin by the pituitary gland.
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- This article is about levothyroxine as a pharmaceutical drug. For its role as a hormone, see Thyroid hormone. Levothyroxine (INN, USAN) or L-thyroxine is a synthetic thyroid hormone that is chemically identical to thyroxine (T 4), which is naturally secreted by the follicular cells of the thyroid gland.It is used to treat thyroid hormone deficiency, and occasionally to prevent the recurrence of thyroid cancer.his article is about levothyroxine as a pharmaceutical drug. For its role as a hormone, see Thyroid hormone. Levothyroxine (INN, USAN) or L-thyroxine is a synthetic thyroid hormone that is chemically identical to thyroxine (T 4), which is naturally secreted by the follicular cells of the thyroid gland.
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THYROXINE The noun THYROXINE has 1 sense: 1. hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells. Familiarity information: THYROXINE used as a noun is very rare.
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- thyrotropin-releasing hormone (TRH), a substance produced in the hypothalamus that stimulates the release of thyrotropin (thyroid-stimulating hormone) from the anterior lobe of the pituitary gland.Formerly called thyrotropin-releasing factor, TSH-releasing factor. (thī'rō-lib'ĕr-in).hyrotropin-releasing hormone. n. Abbr. TRH A tripeptide hormone secreted by the hypothalamus that stimulates the release of thyrotropin.
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thyroxine a thyroid hormone that contains iodine and is a derivative of the amino acid tyrosine, occurring naturally as l-thyroxine; its chemical name is tetraiodothyronine.It is formed and stored in the thyroid follicles as thyroglobulin and released from the gland by the action of a proteolytic enzyme. hormone of the thyroid gland that contains iodine and is a derivative of the amino acid tyrosine. The chemical name for thyroxine is tetraiodothyronine (symbol, T 4); it is formed and stored in the thyroid follicles as thyroglobulin, the storage form.
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calcitonin a polypeptide hormone secreted by the parafollicular or C cells of the thyroid gland, which is involved in plasma calcium homeostasis. It acts to decrease the rate of bone resorption. Called also thyrocalcitonin.
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- Thyroid hormone: A chemical substance made by the thyroid gland for export into the bloodstream. The thyroid gland needs iodine to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3).The thyroid gland is located in front of the neck just in front of the trachea.Last Editorial Review: 8/28/2013.he thyroid gland needs iodine to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3). The thyroid gland is located in front of the neck just in front of the trachea. Last Editorial Review: 8/28/2013.
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Why is Thyroxine called the personality hormone? Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones.Alternative names for thyroxine T4; tetraiodothyronine; thyroxin.hyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones. Alternative names for thyroxine T4; tetraiodothyronine; thyroxin.
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thyroxine thyroxine. n. 1. (Biochemistry) the principal hormone produced by the thyroid gland: it increases the metabolic rate of tissues and also controls growth, as in amphibian metamorphosis. It can be synthesized or extracted from the thyroid glands of animals and used to treat hypothyroidism.
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- a hormone of the thyroid gland that contains iodine and is a derivative of the amino acid tyrosine. The chemical name for thyroxine is tetraiodothyronine (symbol, T 4); it is formed and stored in the thyroid follicles as thyroglobulin, the storage form.
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Alternative names for triiodothyronine Triiodothyronine is the active form of the thyroid hormone, thyroxine. Approximately 20% of triiodothyronine is secreted into the bloodstream directly by the thyroid gland. The remaining 80% is produced from conversion of thyroxine by organs such as the liver and kidneys.
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Glossary Thyroid gland: A gland that makes and stores hormones that help regulate the heart rate, blood pressure, body temperature, and the rate at which food is converted into energy. Thyroid hormones are essential for the function of every cell in the body.hyroid stimulating hormone (TSH), which is produced by the pituitary gland, acts to stimulate hormone production by the thyroid gland. The thyroid gland also makes the hormone calcitonin, which is involved in calcium metabolism and stimulating bone cells to add calcium to bone.
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Thyrotoxic myopathy From Wikipedia, the free encyclopedia. Thyrotoxic myopathy (TM) is a neuromuscular disorder that develops due to the overproduction of the thyroid hormone thyroxine. Also known as hyperthyroid myopathy, TM is one of many myopathies that lead to muscle weakness and muscle tissue breakdown.Evidence indicates the onset may be caused by hyperthyroidism.rom Wikipedia, the free encyclopedia. Thyrotoxic myopathy (TM) is a neuromuscular disorder that develops due to the overproduction of the thyroid hormone thyroxine. Also known as hyperthyroid myopathy, TM is one of many myopathies that lead to muscle weakness and muscle tissue breakdown.
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- The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones produced by the thyroid gland that are primarily responsible for regulation of metabolism. Iodine is necessary for the production of T 3 and T 4.hyroxine is produced by attaching iodine atoms to the ring structures of tyrosine molecules. Thyroxine (T 4) contains four iodine atoms. Triiodothyronine (T 3) is identical to T 4, but it has one less iodine atom per molecule.
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- Noun. 1. thyrotropin-anterior pituitary hormone that stimulates the function of the thyroid gland. thyroid-stimulating hormone, thyrotrophic hormone, thyrotrophin, thyrotropic hormone, TSH.hyrotropin. n. 1. (Biochemistry) a glycoprotein hormone secreted by the anterior lobe of the pituitary gland: it stimulates the activity of the thyroid gland. Also called: thyroid-stimulating hormone.
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- Define thyroxine. thyroxine synonyms, thyroxine pronunciation, thyroxine translation, English dictionary definition of thyroxine. also thy·rox·in n. Abbr. T4 An iodine-containing hormone, C15H11I4NO4, produced by the thyroid gland, that increases the rate of cell metabolism and...
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Medical Definition of Hormone Hormone: A chemical substance produced in the body that controls and regulates the activity of certain cells or organs. Many hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland.Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.any hormones are secreted by special glands, such as thyroid hormone produced by the thyroid gland. Hormones are essential for every activity of life, including the processes of digestion, metabolism, growth, reproduction, and mood control.
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Thyroid-stimulating hormone Thyroid-stimulating hormone (also known as thyrotropin, thyrotropic hormone, TSH, or hTSH for human TSH) is a pituitary hormone that stimulates the thyroid gland to produce thyroxine (T4), and then triiodothyronine (T3) which stimulates the metabolism of almost every tissue in the body.[1] It is a glycoprotein hormone synthesized and secreted by ...
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- Description. Thyroxine hormone is produced in the thyroid gland from tyrosine and iodine. Thyrotropin-releasing hormone (TRH) is produced by the hypothalamus. It stimulates the production of thyroid-stimulating hormone (TSH) in the anterior pituitary gland, which affects the thyroid-stimulating hormone receptor (TSHR).Iodine is captured by a hydrogen peroxide trap procuced by thyroid peroxidase and added to the 3' and 5' postitions of tyrosine.t stimulates the production of thyroid-stimulating hormone (TSH) in the anterior pituitary gland, which affects the thyroid-stimulating hormone receptor (TSHR). Iodine is captured by a hydrogen peroxide trap procuced by thyroid peroxidase and added to the 3' and 5' postitions of tyrosine.
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Definitions C. calcitonin (kal´´su1-to´nin) Also called thyrocalcitonin. A polypeptide hormone produced by the parafollicular cells of the thyroid and secreted in response to hypercalcemia. It acts to lower blood calcium and phosphate concentrations and may serve as an antagonist of parathyroid hormones.
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thyroxine thyroxine. a thyroid hormone that contains iodine and is a derivative of the amino acid tyrosine, occurring naturally as l-thyroxine; its chemical name is tetraiodothyronine. It is formed and stored in the thyroid follicles as thyroglobulin and released from the gland by the action of a proteolytic enzyme.T 4) [ thi-rok´sin ]. a thyroid hormone that contains iodine and is a derivative of the amino acid tyrosine, occurring naturally as l-thyroxine; its chemical name is tetraiodothyronine.
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Steroid and Thyroid Hormone Receptors Introduction to the Thyroid Hormones. The thyroid hormones (called thyronines) are all derived from the amino acid tyrosine within specific follicle cells of the thyroid gland. The primary hormone secreted from the thyroid gland is thyroxine (T4: 3,5,3'5'-tetraiodothyronine).
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- thyroxine. a thyroid hormone that contains iodine and is a derivative of the amino acid tyrosine, occurring naturally as l-thyroxine; its chemical name is tetraiodothyronine. It is formed and stored in the thyroid follicles as thyroglobulin and released from the gland by the action of a proteolytic enzyme. hormone of the thyroid gland that contains iodine and is a derivative of the amino acid tyrosine. The chemical name for thyroxine is tetraiodothyronine (symbol, T 4); it is formed and stored in the thyroid follicles as thyroglobulin, the storage form.
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thyrotropin or. a hormone hormone,secretory substance carried from one gland or organ of the body via the bloodstream to more or less specific tissues, where it exerts some influence upon the metabolism of the target tissue......