Triiodothyronine, tseem hu ua T3, yog lub luag haujlwm tseem ceeb ntawm cov thyroid hormones. Nws yog tsim los ntawm cov thyroid caj pas nrog rau thyroxine (T4). Tsuas yog ib feem me me ntawm tag nrho T3 ncig hauv cov ntshav tuaj ncaj qha los ntawm cov thyroid caj pas, uas tau tshem tawm los ntawm iodine hauv thyroxine ntau dua 80 feem pua ntawm iodine hauv tib neeg cov ntaub so ntswg. Cov thyroid hormones xav tias cuam tshuam yuav luag txhua lub cell hauv lub cev, T3 lub luag haujlwm suav nrog kev txhawb nqa cov metabolism, kev loj hlob thiab kev loj hlob, uas txhais tau hais tias lub cev lub zog, qhov kub thiab txias thiab tag nrho nws cov kabmob thiab cov ntaub so ntswg yog nyob ntawm qhov ua haujlwm ntawm triiodoformin thyroid.
Cov thyroid hormones yog tsim los ntawm tyrosine (ib qho amino acid) thiab iodine molecules. Thyroxine (T4) yog tsim los ntawm ob lub tyrosines thiab plaub iodine atoms, thaum triiodothyronine, los yog T3, kuj yog tsim los ntawm ob tyrosines tab sis tsuas yog peb iodine atoms txuas. Kev tshem tawm ntawm iodine atom hloov T4 mus rau hauv cov tshuaj hormone T3, uas tshwm sim hauv tib neeg cov ntaub so ntswg. Hauv cov ntshav, cov thyroid hormones feem ntau raug khi rau ib qho tshwj xeeb cov khoom noj protein hu ua thyroxine-binding globulin, tab sis kuj tseem muaj me me ntawm kev tsis sib haum xeeb lossis tsis pub dawb T3 thiab T4. Cov thyroid yog nyob rau hauv lub hauv paus ntawm lub caj dab. Lub caj pas pituitary hauv lub hlwb tso tawm cov tshuaj hu ua thyroid-stimulating hormone (TSH), uas ua rau cov thyroid caj pas ua triiodothyronine thiab thyroxine thiab tso tawm rau hauv cov hlab ntsha. Kev poob qis hauv cov tshuaj hormones dawb ua rau lub qog pituitary teb los ntawm kev nce thyrotropin, uas ua rau cov thyroid caj pas tso tawm ntau cov tshuaj hormones. Yog tias cov tshuaj hormones dawb nce, cov thyroid-stimulating hormone (TSH) txo qis, thiab cov thyroid ua rau cov tshuaj hormones tsawg. Cov menyuam yaus uas muaj hyperthyroidism tuaj yeem muaj cov leeg tsis muaj zog thiab ntxhov siab. ua rau hyperthyroidism thiab hypothyroidism, feem. Hauv hypothyroidism, tsis tshua muaj triiodothyronine ua rau cov hlwb ntawm lub cev, cov metabolism hauv qis qis, thiab cov tsos mob ntawm qaug zog thiab txias tshwm sim. Hyperthyroidism overdrives cov metabolism, ua rau cov tsos mob xws li tsis xis nyob, poob phaus thiab raws plab. Iodine yog ib yam khoom siv los ntawm cov thyroid caj pas los tsim triiodothyronine. Feem ntau, kev kuaj ntshav suav nrog TSH thiab T4 dawb, txawm li cas los xij, yog tias TSH qis qis tab sis T4 yog qhov qub, T3 dawb yuav raug ntsuas. Qhov no yog txhawm rau kuaj pom tus mob hu ua T3 thyrotoxicosis, uas cov thyroid caj pas tsim ntau tshaj T3 thaum T4 ntau lawm. Dawb T3 qib tuaj yeem nce siab, thiab feem ntau hom hyperthyroidism yog hyperthyroidism, lossis Graves' kab mob. Kev kho mob hyperthyroidism tuaj yeem suav nrog kev siv tshuaj, kev kho hluav taws xob, lossis kev phais kom tshem tawm cov thyroid caj pas. Hypothyroidism feem ntau yog kho los ntawm kev noj cov thyroid hormones, feem ntau nyob rau hauv daim ntawv ntawm T4 tab sis qee zaum T3, los yog ua ke ntawm ob. Lub caj pas pituitary hauv lub hlwb tso tawm cov thyroid-stimulating hormone, uas qhia cov thyroid caj pas ua thiab tso tawm triiodothyronine. Cov teeb meem thyroid tuaj yeem ua rau ntshav siab.
Any xav tau, thov hu raupeb
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