Kev muaj peev xwm ua tau raug tsim tawm los ntawm cov hom tshwj xeeb ntawm cov hluav taws xob-gated ion channels kos rau hauv lub cell 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 muaj peev xwm tsim tau?
Qhov muaj peev xwm ua tau yog qhov tawg ntawm hluav taws xob ua haujlwm uas yog tsim los ntawm qhov tam sim no depolarizing. Qhov no txhais tau hais 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.
Qhov twg muaj peev xwm ua tau tsim tawm?
Ib qho peev xwm ua tau tsim tawm hauv lub cev ntawm neuron thiab nthuav tawm los ntawm nws cov axon. Kev nthuav tawm tsis txo qis lossis cuam tshuam rau qhov ua tau zoo ntawm qhov ua tau zoo hauv txhua txoj kev, kom cov ntaub so ntswg tau txais tib lub zog txawm tias lawv nyob deb npaum li cas los ntawm lub cev neuronal.
Yuav ua li cas 6 kauj ruam ntawm kev ua tau zoo?
Cov ntsiab lus hauv cov teeb no (6)
- Resting Membrane Potential. Txhua qhov hluav taws xob-gated channel raug kaw.
- Txoj Kev. EPSP summate depolarizing daim nyias nyias mus rau qhov pib, ntawm qhov chaw ua kom lub rooj vag ntawm voltage-gated sodium channels qhib.
- Depolarization Phase. …
- Repolarization Phase. …
- Kev nkag siab. …
- Sodium Potassium twj.
5 kauj ruam ntawm kev ua muaj peev xwm 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.
