Qhov sib txawv tseem ceeb ntawm cov polarized thiab tsis polarized yog tias cov hlwb polarized tau rov qab los ua polarized qhov twg cov ntaub so ntswg muaj peev xwm rov qab los tom qab txhua qhov xwm txheej ntawm depolarisation thaum cov hlwb tsis polarized tau depolarisation los ua tsis polarized qhov chaw so membrane. muaj peev xwm poob los ntawm kev hloov pauv hauv polarization ntawm cell membrane.
Repolarization ua rau cov hlwb polarized thaum depolarization ua rau cov hlwb tsis polarized. Ob qho tib si depolarization thiab repolarization yog ob qhov txheej txheem ua ntu zus uas tshwm sim hauv cov cell membrane thaum lub sij hawm kis ntawm cov hlab ntsha impulses. Yog li ntawd, polarized thiab tsis polarized hlwb tshwm sim vim kev hloov pauv ntawm tus nqi ntawm cov ntaub so ntswg ntawm lub cell thaum lub sij hawm ob qho tib si txheej txheem. Lub puab daim nyias nyias muaj tsawg tus nqi tsis zoo thaum lub sij hawm depolarization (tsis yog polarized cell). Txawm li cas los xij, qhov no tau rov qab los thaum lub sij hawm repolarization (polarised cell).
Cov Cells Polarized yog dab tsi?
Cov hlwb uas muaj polarised tau rov qab los ua polarised. Repolarization yog ib qho txheej txheem uas, ua raws li qhov kev tshwm sim depolarization, kev kho dua tshiab ntawm cov ntaub so ntswg uas muaj peev xwm tshwm sim. Thaum lub sij hawm repolarization, kaw cov membrane sodium channels tshwm sim. Yog li ntawd, qhov no tsim ib tug tsis zoo nqi nyob rau hauv lub cell. Nyob rau tib lub sijhawm, daim nyias nyias cov poov tshuaj channel qhib vim muaj cov ions zoo (Na+) muaj nyob hauv lub cell. Yog li ntawd, cov poov tshuaj ions (K+) txav tawm ntawm lub cell los ntawm cov poov tshuaj raws, ua rau lub cell sab hauv tsis zoo. Yog li ntawd, kev sib xyaw ua ke ntawm tag nrho cov xwm txheej no rov ua kom cov txheej txheem so ntawm daim nyias nyias thiab hloov lub cell mus rau theem polarized.
Daim duab 01: Polarisation
Cell polarization tsis ua rau txhua yam kev ua haujlwm hauv cov khoom nruab nrog cev (xws li cov leeg) los ntawm kev taw qhia. Lub luag haujlwm tseem ceeb ntawm lub cell polarized yog ua kom cov cell membrane npaj xa cov paj hlwb los ntawm depolarization.
Dab tsi yog Cov Cells Tsis Muaj Polarized?
Depolarization tsim cov hlwb tsis polarized. Nws tshwm sim vim qhov kev hloov pauv hauv cov ntaub so ntswg uas muaj peev xwm ua rau tus nqi qis dua (tus nqi zoo dua). Lub peev xwm so ntawm lub cell yog -70mV. Yog li ntawd, cov ntaub so ntswg sab hauv (cell sab hauv) ntawm lub xovtooj ntawm tes muaj cov nqi tsis zoo nyob rau hauv kev sib piv rau sab nrauv (cell sab nrauv).
Ntau yam cuam tshuam rau qhov so ntawm daim nyias nyias. Cov yam tseem ceeb no yog diffusion ntawm potassium ions (K+) los ntawm lub xovtooj txuas ntxiv, kev ua haujlwm ntawm sodium-potassium twj tso kua mis (tso 03 Na+ ions tawm thiab noj 02 K+ nyob rau hauv) thiab muaj ntau cov ions tsis zoo (cov protein thiab phosphate ions) nyob rau hauv sab hauv ntawm lub cell. Cov xwm txheej no hloov pauv thaum lub sijhawm tua hluav taws ntawm qhov muaj peev xwm ua haujlwm (lub paj hlwb) los ntawm kev rhuav tshem daim nyias nyias.
Daim duab 02: Kev Ua Tau Zoo
Ib qho peev xwm ua rau lub tshuab nqus dej ntau ntxiv rau hauv cov hlwb, txo cov nqi tsis zoo ntawm daim nyias nyias. Tua tawm ntawm cov hlab ntsha impulse tshwm sim thaum lub so ntawm daim nyias nyias muaj peev xwm txo qis ntawm -70mV rau -55mV. Txawm li cas los xij, thaum lub sij hawm kis ntawm cov hlab ntsha impulses, cell membrane muaj peev xwm tseem nyob ntawm +30mV.
Dab tsi yog qhov zoo sib xws ntawm Polarized thiab Nonpolarized Cells?
- Ob leeg polarized thiab tsis polarized tshwm sim vim muaj kev hloov pauv hauv daim nyias nyias ntawm cov paj hlwb thaum lub sij hawm xa cov paj hlwb.
- Tsis tas li, kev tsim ntawm ob hom hlwb yog vim qhib thiab kaw cov ion channel thiab vim yog cov haujlwm ntawm sodium potassium
Qhov txawv ntawm Polarized thiab Tsis Polarized Cells yog dab tsi?
Polarised hlwb tau txais kev rov qab los ua polarized thaum cov hlwb tsis polarized tau depolarization los ua tsis muaj polarized. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm polarized thiab tsis polarized hlwb. Ntxiv mus, qhov sib txawv ntxiv ntawm polarized thiab nonpolarized hlwb yog tias cov hlwb tsis polarized koom nrog kev hloov pauv ntawm cov ntaub so ntswg thaum lub hlwb polarized koom nrog kev kho dua tshiab ntawm cov ntaub so ntswg. Tsis tas li ntawd, nyob rau hauv polarized hlwb, inner membrane tseem zoo dua thaum nyob rau hauv nonpolarized hlwb, puab membrane tseem tsis zoo. Yog li, peb tuaj yeem xav txog qhov no kuj yog qhov sib txawv ntawm cov hlwb polarized thiab tsis polarized.
Hauv qab infographic qhia txog qhov sib txawv ntawm cov hlwb polarized thiab tsis polarized.
Summary – Polarized vs Non Polarized Cells
Cov hlwb polarized thiab tsis polarized tshwm sim vim reploarization thiab depolarization, feem. Ob qho txheej txheem tshwm sim vim muaj kev hloov pauv ntawm lub peev xwm hauv cell membrane. Cov hlwb uas tsis muaj polarized koom nrog kev hloov pauv ntawm cov ntaub so ntswg uas muaj peev xwm so thaum lub hlwb polarized koom nrog kev kho kom rov zoo ntawm cov ntaub so ntswg. Lawv yog cov txheej txheem ua ntu zus uas tshwm sim thaum lub sij hawm kis ntawm paj hlwb impulses. Ob hom cell yog qhov tseem ceeb rau kev sib kis ntawm cov hlab ntsha impulses thiab rau nws cov kev cai. Yog li, qhov no qhia txog qhov sib txawv ntawm polarized thiab tsis polarized hlwb.
