Kev ua haujlwm muaj peev xwm yog tsim los ntawm tshwj xeeb ntawm cov hluav taws xob-gated ion channels kos rau hauv lub cell's plasma membrane … Thaum cov channel qhib, lawv tso cai rau sab hauv ntawm sodium ions, uas Hloov cov electrochemical gradient, uas nyob rau hauv lem ua ib tug ntxiv nce nyob rau hauv lub membrane muaj peev xwm mus rau xoom.
Yuav ua li cas thiaj tsim tau?
Qhov muaj peev xwm ua tau yog qhov tawg ntawm hluav taws xob ua haujlwm uas yog tsim los ntawm qhov tsis muaj zog tam sim noQhov no txhais tau tias qee qhov xwm txheej (kev txhawb nqa) ua rau lub peev xwm so kom txav mus rau 0 mV. … Cov peev xwm ua tau yog tshwm sim thaum sib txawv ions hla lub paj hlwb. Kev txhawb nqa thawj zaug ua rau cov chaw sodium qhib.
Yuav ua li cas muaj peev xwm tsim tawm thiab nthuav tawm?
Kev nthuav tawm ntawm qhov muaj peev xwm Ib qho peev xwm ua tau tsim tawm hauv lub cev ntawm
cov neuron thiab nthuav tawm los ntawm nws cov axon … cell daim nyias nyias. Nws propagates raws daim nyias nyias nrog txhua qhov txuas ntxiv ntawm daim nyias nyias ua ntu ntu depolarized.
Yuav ua li cas 6 kauj ruam ntawm kev ua tau zoo?
Qhov peev xwm ua tau muaj ntau theem; hypopolarization, depolarization, overshoot, repolarization thiab hyperpolarization.
5 kauj ruam ntawm kev ua tau zoo yog dab tsi?
Qhov peev xwm ua tau tuaj yeem faib ua tsib theem: lub peev xwm so, qhov pib, theem nce, theem poob, thiab theem rov qab.
