Video: Vim li cas cov neurons hu ua excitable cells?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Teb: Neurons yog hu ua excitable cells vim tias cov membranes no nyob rau hauv lub xeev polarized. Cov yam ntxwv tshwj xeeb ntawm membrane ntawm neuron yog (i) Excitability Neurons muaj peev xwm nkag siab txog kev txhawb nqa thiab nkag mus rau hauv lub xeev kev ua haujlwm tshwm sim los ntawm kev hloov pauv hauv hluav taws xob muaj peev xwm sib txawv thoob plaws nws cov npog membrane.
Tom qab ntawd, ib tus tseem tuaj yeem nug, vim li cas cov paj hlwb zoo siab?
Neurons yog hluav taws xob zoo siab , vim kev saib xyuas ntawm voltage gradients thoob plaws lawv daim nyias nyias. Yog hais tias qhov voltage hloov los ntawm ib tug loj txaus npaum li cas nyob rau hauv ib tug luv luv lub sij hawm, lub neuron generates ib tug tag nrho-lossis-tsis muaj dab tsi electrochemical mem tes hu ua ib qho peev xwm ua.
Tsis tas li ntawd, cov cell twg muaj cov kab mob zoo tshaj plaws thiab vim li cas? Thib ob, hauv hluav taws xob excitable hlwb xws li neurons thiab cov leeg hlwb , nws yog siv los xa cov teeb liab ntawm qhov sib txawv ntawm a ntawm tes . Teeb liab yog tsim los ntawm kev qhib lossis kaw ntawm ion raws ntawm ib kis hauv daim nyias nyias , ua ib qho kev hloov hauv zos hauv lub daim nyias nyias peev xwm.
Zoo sib xws, dab tsi yog qhov txaus siab ntawm cov cell?
Zoo siab cell . Lus Txhais: Hais txog lub peev xwm ntawm qee tus hlwb kom muaj hluav taws xob zoo siab uas ua rau muaj kev ua tau zoo. Neurons, leeg hlwb (pob txha, mob plawv, thiab du), thiab qee qhov endocrine hlwb (piv txwv li, insulin-tso tawm pancreatic β hlwb ) yog cov cell zoo siab.
Dab tsi yog qhov txawv ntawm excitable thiab non excitable hlwb?
Tsis yog txhua txhua ntawm tes muaj peev xwm tib yam. Txaus siab rau cov cell muaj peev xwm so uas muaj li ntawm -50mV txog -85mV, thaum tsis yog - excitable hlwb muaj peev xwm ntawm -5 mV rau -10 mV. Cov kab mob txaus ntshai suav nrog cov neurons thiab cov leeg pob txha hlwb , thaum tsis yog - excitable hlwb suav nrog cov ntshav liab ntawm tes.
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