Kev nyob yog tseem ceeb rau cov ntaub ntawv ua haujlwm hauv paj hlwb, raws li nws txiav txim siab seb, thiab ntau npaum li cas, maj mam hloov lub ntuj thiab dag stimuli yog txhais ua qhov muaj peev xwm ua tau.
Dab tsi ua rau muaj kev pab cuam neural?
Neural kev pab lossis kev pabcuam neuronal tshwm sim thaum lub neuron lossis cov leeg hlwb depolarised los ntawm maj mam nce tam sim no (ramp depolarisation) hauv vitro.
Yuav ua li cas nyob rau hauv kev ua tau zoo?
Txoj Kev Muaj Peev Xwm Ua Haujlwm
Ib qho xwm txheej thaum RMP dhau los ze rau qhov pib muaj peev xwm, tab sis tsis muaj depolarization tshwm sim, hu ua chaw nyob. … Yog tias koj muab kev txhawb nqa, RMP tuaj yeem ncav cuag qhov pib muaj peev xwm, tab sis depolarization yuav tsis tshwm sim vim tias feem ntau ntawm Na + channel tau daig hauv lub xeev tsis muaj zog.
Qhov muaj peev xwm ntawm cov neuron yog dab tsi?
Feem ntau, qhov pib muaj peev xwm yog qhov muaj peev xwm ntawm daim nyias nyias nruab nrab ntawm -50 thiab -55 mV, tab sis tuaj yeem sib txawv raws li ntau yam. Ib qho neuron qhov so ntawm daim nyias nyias muaj peev xwm (–70 mV) tuaj yeem hloov pauv mus rau qhov nce lossis txo qhov nce mus txog qhov pib ntawm sodium thiab potassium ions.
Dab tsi yog cov khoom ntawm cov hlab ntsha Fibers?
Excitability: › paj hlwb yog cov ntaub so ntswg excitable› teb rau ntau yam stimuli › Muaj peev xwm tsim hluav taws xob impulse Conductivity: › kev ua tau zoo yog tsim los ntawm cov paj hlwb, uas yog propagated raws nws tag nrho ntev mus rau axon terminal.
