T3 (triiodothyronine) thiab T4 (thyroxine) yog ob qho tib si cov tshuaj hormones tsim los ntawm cov thyroid caj pas thiab ua lub luag haujlwm tseem ceeb hauv kev tswj cov metabolism, kev loj hlob, thiab kev loj hlob hauv lub cev. Thaum lawv zoo sib xws hauv ntau txoj hauv kev, kuj tseem muaj qhov sib txawv tseem ceeb ntawm T3 thiab T4:
Kev sib xyaw:
T3: Triiodothyronine yog tsim los ntawm peb iodine atoms thiab yog cov tshuaj lom neeg ntau dua ntawm cov thyroid hormones. Nws yog tsim nyob rau hauv me me los ntawm cov thyroid caj pas tab sis muaj zog ntau zog rau cov ntaub so ntswg.
T4: Thyroxine yog tsim los ntawm plaub lub iodine atoms thiab yog cov qauv tseem ceeb ntawm cov thyroid hormone tsim los ntawm cov thyroid caj pas. Nws yog tsim nyob rau hauv ntau ntau dua T3 tab sis raug suav hais tias yog ib tug prohormone vim nws hloov mus rau hauv T3 nyob rau hauv cov ntaub so ntswg peripheral.
Kev Ua Txhaum Cai:
T3: Triiodothyronine yog cov tshuaj lom neeg ntau dua ntawm cov thyroid hormones thiab muaj zog ntau dua ntawm cov cellular metabolism. Nws khi rau cov thyroid hormone receptors hauv cov ntaub so ntswg thiab tswj cov noob qhia, metabolism, thiab lub zog tsim khoom.
T4: Thyroxine tsis tshua muaj roj ntsha ntau dua li T3 tab sis ua haujlwm raws li lub chaw khaws cov thyroid hormone hauv lub cev. Nws hloov mus rau hauv T3 nyob rau hauv cov ntaub so ntswg peripheral, qhov twg nws exerts nws cov teebmeem ntawm metabolism thiab cellular muaj nuj nqi.
Metabolic Rate:
T3: Triiodothyronine muaj qhov cuam tshuam tam sim ntawd thiab tshaj tawm ntawm cov kab mob metabolic thiab kev siv hluav taws xob piv rau T4. Nws stimulates cellular metabolism, nce oxygen noj, thiab txhawb kev tsim hluav taws xob.
T4: Thyroxine pab txhawb rau metabolic tus nqi thiab lub zog ntau lawm indirect los ntawm nws hloov dua siab tshiab rau hauv T3. Thaum T4 muaj ib nrab-lub neej ntev thiab circulates nyob rau hauv siab dua T3, nws cov teebmeem metabolic yog kho feem ntau los ntawm nws hloov dua siab tshiab rau hauv T3.
Production thiab Secretion:
T3: Triiodothyronine yog tsim nyob rau hauv me me los ntawm cov thyroid caj pas ncaj qha, tab sis ib tug tseem ceeb npaum li cas yog tsim los ntawm kev hloov ntawm T4 rau hauv T3 nyob rau hauv peripheral cov ntaub so ntswg.
T4: Thyroxine yog cov tshuaj hormones tseem ceeb tsim thiab tso tawm los ntawm cov thyroid caj pas. Nws yog synthesized thiab tso rau hauv cov hlab ntsha nyob rau hauv cov lus teb rau cov thyroid-stimulating hormone (TSH) los ntawm lub caj pas pituitary.
Kev cai:
T3 thiab T4 secretion yog nruj tswj hwm los ntawm kev tawm tswv yim mechanisms uas muaj cov hypothalamus, pituitary caj pas, thiab thyroid caj pas. Cov thyroid-stimulating hormone (TSH) los ntawm pituitary caj pas txhawb kev tsim tawm thiab tso tawm ntawm ob qho tib si T3 thiab T4, thaum cov lus qhia tsis zoo yuav pab tswj cov thyroid hormones hauv qhov nqaim.
Hauv kev xaus, T3 thiab T4 yog ob qho tib si tseem ceeb cov thyroid hormones uas tswj cov metabolism, kev loj hlob, thiab kev loj hlob hauv lub cev. Thaum T4 yog daim ntawv tseem ceeb ntawm cov thyroid hormone tsim los ntawm cov thyroid caj pas, T3 yog daim ntawv lom neeg ntau dua thiab ua rau muaj zog ntau dua ntawm cov cellular metabolism thiab lub zog tsim. Ob qho tshuaj hormones ua haujlwm ua ke los tswj cov thyroid ua haujlwm thiab metabolic homeostasis hauv lub cev.
