Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?

Video: Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?

Video: Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
Video: BABY XAV NTSIB KOJ (BABY I WANNA MEET YOU) - NT ONE [OFFICIAL MUSIC VIDEO] | HMONG NEW SONG 2023 2024, Kaum ib hlis
Anonim

Qhov sib txawv ntawm daim nyias nyias peev xwm thiab cov equilibrium muaj peev xwm (-142 mV) sawv cev rau net electrochemical quab yuam tsav Na+ nyob rau hauv lub cell ntawm so daim nyias nyias peev xwm . Ntawm so Txawm li cas los xij, qhov permeability ntawm daim nyias nyias rau Na+ tsawg heev ces tsuas yog me me xwb Na+ ntws mus rau hauv lub cell.

Ib yam li ib tug yuav nug, qhov sib npaug ntawm qhov muaj peev xwm txhais tau li cas?

Equilibrium (los yog thim rov qab) muaj peev xwm Rau txhua ion, lub kev sib npaug (los yog thim rov qab) muaj peev xwm yog daim nyias nyias peev xwm qhov twg cov net ntws los ntawm txhua qhov qhib channel yog 0. Hauv lwm lo lus, ntawm Erev, tshuaj thiab hluav taws xob yog hauv kev sib npaug.

Ib yam li ntawd, vim li cas thiaj li so daim nyias nyias muaj peev xwm ze dua rau cov peev txheej ntawm cov poov tshuaj sib npaug? Qhov piv, r, yog qhov tsis zoo txij li sodium thiab poov tshuaj ions yog pumped nyob rau hauv opposite lus qhia. Nco ntsoov tias tus nqi ntawm cov so membrane muaj peev xwm yog ze dua mus rau tus nqi ntawm cov potash peev xwm . Yog li, yuav tsum muaj kev tsav tsheb ntau dua rau kev nkag mus ntawm sodium ions thoob plaws lub daim nyias nyias.

Kuj Paub, puas muaj peev xwm hloov pauv?

Yog li ntawd, Na+ equilibrium muaj peev xwm ua tau tsis yog hloov thaum los yog tom qab kev ua peev xwm . Rau txhua qhov kev ua ntawm tus kheej peev xwm , tus nqi Na+ uas tuaj rau hauv lub cell thiab tus nqi ntawm K+ uas nplooj yog insignificant thiab tsis muaj kev cuam tshuam rau tej concentrations.

Puas permeability cuam tshuam qhov muaj peev xwm sib npaug?

Yog lub membrane permeability rau K+ ions yog nce, K+ equilibrium muaj peev xwm (Nernst peev xwm ) a. yuav ua zoo dua.

Pom zoo: