Thaum lub depolarization nce mus txog kwv -55 mV tus neuron yuav tua qhov muaj peev xwm ua. Qhov no yog qhov pib. Yog tias cov neuron tsis ncav cuag qhov tseem ceeb ntawm qhov pib, ces tsis muaj peev xwm ua haujlwm yuav tua.
Yuav ua li cas thaum qhov pib mus txog?
Ib qho stimulus los ntawm lub hlwb los yog lwm neuron ua rau lub hom phiaj cell depolarize mus rau qhov pib muaj peev xwm. Yog hais tias qhov pib ntawm excitation mus txog, all Na+ channel qhib thiab cov membrane depolarizes.
Puas depolarization tshwm sim tom qab qhov pib?
Thaum lub peev xwm ntawm daim nyias nyias ntawm axon hillock ntawm cov neuron nce mus txog qhov pib, qhov kev hloov pauv sai ntawm daim nyias nyias muaj peev xwm tshwm sim nyob rau hauv daim ntawv ntawm kev ua haujlwm. Qhov kev hloov pauv hauv daim nyias nyias muaj peev xwm muaj peb theem. Ua ntej is depolarization, ua raws li repolarization thiab lub sijhawm luv ntawm hyperpolarization.
qhov pib depolarization yog dab tsi?
Threshold depolarization txhais tau tias yog lub amplitude ntawm depolarization uas yuav cia li coj ib tug neurone rau nws qhov pib tua. … Tus nqi pom ntawm qhov pib depolarization yog nyob ib ncig ntawm 5 mV rau tag nrho 6 motoneurones uas tau sim ua tiav.
Qhov pib ntawm qhov muaj peev xwm ua tau yog dab tsi?
Thaum lub depolarization nce mus txog kwv -55 mV tus neuron yuav tua qhov muaj peev xwm ua. Qhov no yog qhov pib. Yog tias cov neuron tsis ncav cuag qhov tseem ceeb ntawm qhov pib, ces tsis muaj peev xwm ua haujlwm yuav tua.
