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Video: Yuav ua li cas cov ntawv cog lus hauv lub plawv depolarize?
![Video: Yuav ua li cas cov ntawv cog lus hauv lub plawv depolarize? Video: Yuav ua li cas cov ntawv cog lus hauv lub plawv depolarize?](https://i.ytimg.com/vi/BNTHKYTz0Bs/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Lub nthwv dej ntawm depolarization pib nyob rau hauv txoj cai atrium, thiab lub impulse kis thoob plaws lub superior feem ntawm ob qho tib si atria thiab ces down los ntawm lub cov kab mob sib kis . Cov cov kab mob sib kis ces pib kev cog lus los ntawm superior rau qhov qis dua ntawm atria, ua tau zoo tso ntshav rau hauv lub plawv.
Raws li txoj cai, ua li cas lub plawv plawv depolarize?
Qhov peev xwm ua tau pib nrog qhov hluav taws xob dhau los ua qhov zoo dua; qhov no hu ua depolarization thiab yog vim li cas rau qhib cov sodium channel uas tso cai rau Na+ rau ntws mus rau hauv ntawm tes.
Qhov thib ob, dab tsi pib qhov kev nqis tes ua hauv lub siab? Sinoatrial (SA) ntawm ib txwm tsim cov peev xwm ua , i.e. hluav taws xob impulse uas pib kev cog lus Lub SA node excites txoj cai atrium (RA), taug kev los ntawm Bachmann lub nras kom excite sab laug atrium (LA).
Tom qab ntawd, lo lus nug yog, ua li cas depolarization thiab repolarization tshwm sim hauv plawv?
Txhua qhov cuam tshuam (nthwv dej) ntawm ECG sawv cev rau ib qho depolarization los yog repolarization ntawm qhov tshwj xeeb ntawm cov plawv . Vim depolarization tshwm sim ua ntej cov khoom sib dhos, cov nthwv dej ntawm depolarization ua tau yuav cuam tshuam nrog kev txo qis thiab so ntawm atria thiab lub ventricles.
Depolarisation ntawm lub plawv txhais li cas?
Lub plawv cov leeg nqaij yog polarized thaum so. Qhov no txhais tau tias tias cov nuj nqi sib nqus ntawm cov kua sab hauv thiab sab nraud ntawm cov cell sib txawv, vim tias cov tshuaj ion ntau sib txawv ntawm ob sab ntawm cov xovtooj ntawm tes. Qhov no ua rau muaj kev hloov pauv ntawm lub peev xwm ntawm tes ( depolarization ).
Pom zoo:
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Lub hauv paus ntawm lub plawv (sab nraub qaum): Nws tau tsim los ntawm sab laug atrium, uas yog plaub txoj hlab ntshav hlab ntshav. Nws nyob ntawm qhov ntxeev ntawm lub apex
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SA Node tau txuas ncaj qha rau kev cog lus atrial cardiomyocytes thiab qee qhov kev coj ua uas paub zoo hu ua 'Interatrial Band' uas nthuav tawm qhov ua tau sai los ntawm sab xis mus rau sab laug atrium. Yog li, tom qab pib los ntawm SA Node, lub plawv ua haujlwm muaj peev xwm ua ntej kis mus thoob plaws ob qho tib si atria
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