Video: Yuav muaj dab tsi tshwm sim yog tias tus neeg mob Arteriole raug txwv?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Zuag qhia tag nrho cov txwv ntawm afferent hlab ntsha txo ob leeg ntshav khiav thiab pom siab qhov twg li txwv cov arteriole zoo txo cov ntshav ntws tab sis ua kom pom kev siab dua. Qhov tseeb tias ob qho tib si tuaj yeem hloov pauv tau tso cai ywj pheej ntawm GFR thiab ntshav ntws.
Ua raws li qhov kev pom no, dab tsi ua rau constriction ntawm afferent Arteriole?
Sympathetic Nerve Nyob rau hauv cov xwm txheej ntawm kev ntxhov siab, kev mob siab rau lub paj hlwb ua haujlwm nce ntxiv, ua rau ncaj qha vasoconstriction ntawm afferent arterioles (norepinephrine effect) nrog rau kev txhawb nqa ntawm adrenal medulla.
Ib tus kuj tseem yuav nug tau, yuav ua li cas hloov pauv qhov muaj txiaj ntsig thiab cuam tshuam Arteriole cuam tshuam rau GFR? Ib qho kev nce hauv afferent hlab ntsha txoj kab uas hla (txo nyob rau hauv tsis kam) ua rau ib tug nce nyob rau hauv glomerular capillary hydrostatic siab thiab nce nyob rau hauv GFR . Ib tug txo nyob rau hauv txoj kab uas hla ntawm lub afferent hlab ntsha muaj qhov rov qab cov nyhuv . Ib tug txo nyob rau hauv txoj kab uas hla ntawm lub arteriole zoo muaj qhov opposite cov nyhuv.
Tsis tas li ntawd, vim li cas qhov kev txwv ntawm kev sib raug zoo Arteriole ua rau lub siab poob qis hauv glomerulus?
Kev txwv ntawm afferent arterioles muaj ob qhov cuam tshuam: nws ua rau kom cov hlab ntsha tsis ua haujlwm uas txo qis raum cov ntshav khiav (RBF), thiab nws txo qis siab downstream los ntawm txwv , uas txo GFR. Kev nruj ntawm cov hlab ntsha loj kuj ua rau cov hlab ntshav tiv taus kom nws txo RBF.
Qhov efferent Arteriole ua li cas?
(Label" Ua tau zoo nkoj" yog pom nyob rau sab saud.) Kev faib cov hlab ntsha hauv cortex ntawm lub raum. Cov cov hlab ntsha loj tsim los ntawm kev sib hloov ntawm cov hlab ntsha ntawm glomerulus, thiab nqa ntshav tawm ntawm glomerulus uas muaj twb tau lim lawm.
Pom zoo:
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