Depolarization yog tshwm sim los ntawm nce nrawm hauv daim nyias nyias muaj peev xwm qhib cov sodium channels hauv cellular membrane, ua rau muaj ntau cov sodium ions. Membrane Repolarization tshwm sim los ntawm kev ua haujlwm sai ntawm sodium channel nrog rau cov dej loj ntawm cov poov tshuaj ions uas tshwm sim los ntawm cov kab hluav taws xob ua kom muaj zog.
Yuav ua li cas thaum lub sij hawm depolarization nyob rau hauv ib qho kev nqis tes ua?
Thaum muaj peev xwm ua tau, qhov depolarization yog loj heev uas qhov sib txawv ntawm cov cell membrane luv luv thim rov qab polarity, nrog rau sab hauv ntawm tes ua qhov zoo. … Qhov ntxeev ntawm qhov depolarization yog hu ua hyperpolarization.
Dab tsi ua rau depolarization rau qhov kev txiav txim siab muaj peev xwm?
Kev nkag mus ntawm sodium ions mus rau hauv cov kua dej intracellularua rau depolarization ntawm neuron lub cell membrane sab hauv. Thaum lub sij hawm kis tau tus mob muaj peev xwm nyob rau hauv lub neurilemma ntawm ib tug myelinated neuron, raws li ib tug node yog repolarizing, lub tom ntej node yog depolarizing.
Yuav ua li cas ib feem ntawm qhov kev txiav txim yuav ua rau lub depolarization ntawm tes?
Thaum pib muaj peev xwm ua tau, voltage-gated sodium channels qhib, tso cai rau sodium ions nkag mus rau ntawm tes. Qhov no ua rau lub xovtooj ntawm tes ua kom zoo dua piv rau sab nraud ntawm tes. Cov txheej txheem no hu ua depolarization.
Dab tsi ua rau depolarization ntawm daim nyias nyias thaum muaj peev xwm ua tau?
Depolarization thiab hyperpolarization tshwm sim thaum ion channels hauv daim nyias nyias qhib lossis kaw, hloov lub peev xwm ntawm qee hom ions nkag mus lossis tawm ntawm lub cell. … Kev qhib cov channel uas cia cov ions zoo ntws mus rau hauv lub cell tuaj yeem ua rau depolarization.
