Video: Puas muaj peev xwm equilibrium zoo ib yam li so muaj peev xwm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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:
Puas yog lub zog gravitational zoo ib yam li lub zog muaj peev xwm?
Lub zog muaj peev xwm yog lub zog uas khaws cia rau hauv ib yam khoom lossis khoom siv. Gravitational muaj peev xwm zog yog lub zog nyob rau hauv ib yam khoom uas yog tuav nyob rau hauv ib tug ntsug txoj hauj lwm. Elastic muaj peev xwm lub zog yog lub zog khaws cia hauv cov khoom uas tuaj yeem ncab lossis compressed
Dab tsi yog qhov txawv ntawm electrostatic muaj peev xwm thiab electrostatic muaj peev xwm zog?
Tsis muaj qhov sib txawv ntawm electrostatic potentialenergy thiab hluav taws xob (al) muaj peev xwm zog. Lub peev xwm hluav taws xob ntawm ib qho taw tes yog kev ua haujlwm los ntawm lwm qhov kev quab yuam hauv kev txav chav tsev zoo los ntawm ib qho arbitrarilychosen xoom ntawm lub peev xwm (feem ntau infinity) mus rau lub ntsiab lus
Puas muaj peev xwm hluav taws xob thiab lub zog muaj peev xwm tib yam Vim li cas lossis vim li cas ho tsis?
Lub zog muaj peev xwm hluav taws xob Ue yog lub zog muaj peev xwm khaws cia thaum cov nqi tawm ntawm qhov sib npaug (xws li lub zog muaj peev xwm gravitational). Lub peev xwm hluav taws xob zoo ib yam, tab sis ib tus nqi, Ueq. Ib qho hluav taws xob muaj peev xwm sib txawv ntawm ob lub ntsiab lus hu ua voltage, V = Ue2q−Ue1q
Yam dab tsi ntawm cov dej zoo tshaj plaws piav qhia nws lub peev xwm los yaj ntau yam khoom siv?
Vim tias nws cov polarity thiab muaj peev xwm tsim cov ntawv cog lus hydrogen, dej ua rau cov kuab tshuaj zoo heev, txhais tau tias nws tuaj yeem yaj ntau hom molecules
Yuav ua li cas muaj ntau yam genotypes muaj peev xwm rau lub tsho tiv no Xim nyob rau hauv luav?
Plaub qhov sib txawv muaj nyob rau hauv cov xim luav (C) gene