| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,754,743,796 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Thyroxin |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
|
Thyroxin The hormone secreted by the thyroid gland. Mentioned in: Goiter thyroxine, thyroxin 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, T4); it is formed and stored in the thyroid follicles as thyroglobulin, the storage form. Thyroxine is released from the gland by the action of a proteolytic enzyme. 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. Thyroxine can be extracted from animals or made synthetically; it is used in the treatment of hypothyroidism and some types of goiter. free thyroxine the metabolically active fraction of thyroxine; abbreviated FT4, Tf. T4 = Tf + TBG. The amount is very small and difficult to estimate so that the amount present in serum is not used as a more accurate indicator of thyroxine status than T4. thyroxine-binding globulin (TBG) most (99.95%) of the thyroxine in plasma is bound to globulin and a small amount bound to prealbumin. thyroxine-binding prealbumin bound to a small fraction of circulating T4. This is the only known function of prealbumins. L-thyroxine see levothyroxine. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| Medical browser | ? | ? Full browser | |||
|---|---|---|---|---|---|
thyrotropin alpha thyrotropin blocking antibody thyrotropin releasing hormone stimulation test thyrotropin-releasing hormone thyrotropin-releasing hormone stimulation test thyrotropism thyrotrops Thyroxin thyroxine thyroxine-binding globulin thyroxine-binding globulin test Thysaniezia Thysanosoma actinioides Ti TIA |
| ||||
| Medical Dictionary |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|