![Puas yog Purkinje fiber ntau lub tshuab pacemaker? Puas yog Purkinje fiber ntau lub tshuab pacemaker?](https://i.answers-medical.com/preview/medical-health/14119444-are-purkinje-fibers-pacemaker-cells-j.webp)
Video: Puas yog Purkinje fiber ntau lub tshuab pacemaker?
![Video: Puas yog Purkinje fiber ntau lub tshuab pacemaker? Video: Puas yog Purkinje fiber ntau lub tshuab pacemaker?](https://i.ytimg.com/vi/TnFoJ7Hhi-M/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Physiologically, tshwj xeeb ventricular hlwb hu ua Purkinje fibers tuaj yeem ua haujlwm raws li a pacemaker thaum lub qhov ntswg thiab atrioventricular nodes tsis ua haujlwm zoo, ua rau lub plawv dhia khiav tawm lossis lub suab sib luag ntawm tus nqi ntawm kwv yees li 30 txog 40 ntaus/min hauv dev thiab 60 txog 130 ntaus/min hauv miv.
Hauv qhov no, puas yog Purkinje fibers paj hlwb?
Purkinje hlwb , kuj hu Purkinje neurons, yog neurons hauv cov tsiaj txhu vertebrate nyob hauv cerebellar cortex ntawm lub hlwb . Purkinje cell Lub cev yog zoo li lub raj mis thiab muaj ntau threadlike extensions hu ua dendrites, uas tau txais impulses los ntawm lwm cov neurons hu ua granule hlwb.
Ib sab saum toj no, dab tsi yog cov pacemaker hlwb ntawm lub plawv? Sinoatrial (SA) node lossis sinus node yog tus lub plawv ntuj pacemaker . Nws yog ib pawg me me ntawm kev tshwj xeeb hlwb nyob rau sab saum toj ntawm txoj cai atrium (chav sab saud ntawm plawv ). Nws tsim cov hluav taws xob impulses uas ua rau koj plawv mus ntaus.
Raws li, txheej ntawm lub plawv yog Purkinje fibers pom?
ːrˈk?nd?i/ pur-KIN-jee; Purkinje cov ntaub so ntswg lossis cov kab mob subendocardial) nyob hauv cov phab ntsa hauv plawv ntawm lub plawv, tsuas yog hauv qab endocardium hauv qhov chaw hu ua subendocardium.
Lub luag haujlwm ntawm Purkinje fibers yog dab tsi?
Purkinje fibers yog tes hauj lwm ntawm fibers uas tau txais cov cim qhia txog keeb kwm ntawm lub atrioventricular node (AVN), thiab ib txhij ua rau sab laug thiab sab xis ventricles los ntawm ncaj qha stimulating lub ventricular myocardium.
Pom zoo:
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