Cov paj hlwb raug xa los ntawm ib lub neuron mus rau tom ntej los ntawm qhov sib txawv lossis qhov sib cais hu ua qhov sib txawv synaptic lossis cleft lossis synapse los ntawm cov txheej txheem tshuaj. Synapses yog tshwj xeeb junctions los ntawm cov hlwb ntawm lub paj hlwb sib txuas lus rau ib leeg thiab kuj non-neuronal hlwb xws li cov leeg thiab qog.
Dab tsi yog txheej txheem ntawm kev xa paj hlwb?
Neural kis tau tshwm sim thaum lub paj hlwb qhib, lossis raug rho tawm haujlwm(xa tawm hluav taws xob impulse). … Thaum ib tug neuron txhawb kom txaus kom ncav cuag qhov pib ntawm neural (ib theem ntawm stimulation hauv qab uas lub cell tsis tua), depolarization, los yog ib qho kev hloov ntawm lub peev xwm ntawm tes, tshwm sim.
Dab tsi yog qhov tseem ceeb rau kev xa cov paj hlwb?
Resting Potential Lub twj tso kua mis sodium-potassium txav ob qho tib si ions los ntawm thaj chaw qis dua mus rau siab dua, siv lub zog hauv ATP thiab cov khoom thauj cov protein hauv cov cell membrane. … Tightly tswj cov membrane so lub peev xwm yog qhov tseem ceeb rau kev xa cov hlab ntsha impulses.
Qhov twg hauv qab no yog qhov ua rau kis cov hlab ntsha impulse los ntawm cov hlab ntsha Fiber hauv ib qho kev taw qhia?
Cov hlab ntsha impulses yog tsim thaum tau txais kev txhawb nqa. Lub impulses ntawm cov hlab ntsha yog faib nyob rau hauv ib qho kev taw qhia. Kev tso tawm ntawm cov neurotransmitters yog qhov ua rau tseem ceeb rau kev xa mus rau unidirectional. Cov telodendrites, uas muaj nyob rau ntawm qhov kawg ntawm lub axon, tso cov neurotransmitters xws liCov tshuaj acetylcholine.
myelin yog dab tsi thiab nws cuam tshuam li cas rau kev xa cov paj hlwb?
Myelin yog ib txheej insulating, los yog sheath uas tsim nyob ib ncig ntawm cov hlab ntsha, nrog rau cov nyob rau hauv lub hlwb thiab qaum qaum. … Qhov no myelin sheath tso cai rau hluav taws xob impulses kis tau sai thiab ua tau zoo raws cov paj hlwb. Yog tias myelin puas lawm, cov impulses qeeb. Qhov no tuaj yeem ua rau muaj kab mob xws li ntau yam sclerosis.
