Video: Ion twj tso kua mis yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
P-class ion twj muaj cov transmembrane catalytic α subunit, uas muaj qhov chaw ATP-binding, thiab feem ntau yog ib qho me me β subunit, uas tej zaum yuav muaj kev tswj hwm kev ua haujlwm. Ntau yam ntawm no twj yog tetramers tsim ntawm ob α thiab ob β subunits.
Tsis tas li ntawd, ion twj tso kua mis ua dab tsi?
Hauv biology, ib ion transporter (los yog ion twj ) yog transmembrane protein uas txav mus ions hla ib cov kab mob lom tiv thaiv lawv cov concentration gradient los ntawm kev thauj mus los.
Kuj Paub, yog ion twj tso kua mis nquag los yog passive? Cov twj yog ib hom nquag thauj uas pom ions thiab molecules tiv thaiv lawv cov concentration gradient. Protein channels uas undergo passive thauj ua haujlwm tawm tsam cov twj , tso cai rau sodium ions nkag mus rau hauv lub cell tas li, yog li cov twj ua hauj lwm kom tshem tawm qhov tshaj ions.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog membrane twj tso kua mis?
Teb thiab piav qhia: Cov channel thiab twj uas hla lub cell daim nyias nyias yog ua tawm ntawm cov protein. Cov proteins tuaj yeem quav rau hauv cov qauv uas tso cai rau cov ntaub ntawv dhau mus
Cov twj ion puas xav tau lub zog?
Cov protein pores no tsuas yog txav mus ions down lawv concentration gradient. Ion channels tau hais tias "passive" vim tsis yog zog (ATP) yog xav tau txhawm rau qhib cov protein, tsuas yog ligand lossis hloov pauv hauv qhov hluav taws xob. Ion twj tso kua mis Ntawm qhov tod tes, yog active proteins.
Pom zoo:
Lub twj tso kua mis cell membrane yog dab tsi?
Cov twj tso kua mis, tseem hu ua transporters, yog transmembrane proteins uas nquag txav ions thiab / los yog cov kuab tshuaj tiv thaiv ib qho concentration lossis electrochemical gradient hla cov kab mob lom. Cov twj tso kua mis tsim kom muaj peev xwm ntawm daim nyias nyias los ntawm kev tsim cov tshuaj electrochemical gradient thoob plaws daim nyias nyias
Yog vim li cas sodium poov tshuaj twj tso kua mis suav hais tias yog ib qho kev thauj mus los uas cov kev taw qhia yog cov sodium thiab poov tshuaj tau pumped?
Sodium-Potassium Pump. Kev thauj mus los yog lub zog xav tau cov txheej txheem ntawm kev siv cov molecules thiab ions hla daim nyias nyias 'nce toj' - tiv thaiv kev sib tw gradient. Txhawm rau txav cov molecules tawm tsam lawv cov concentration gradient, yuav tsum muaj cov khoom siv protein
Lub luag haujlwm ntawm sodium potassium twj tso kua mis yog dab tsi?
Lub twj tso kua mis sodium potassium (NaK twj tso kua mis) yog qhov tseem ceeb rau ntau lub cev ua haujlwm, xws li lub paj hlwb teeb liab, lub plawv dhia, thiab lub raum ua haujlwm. Lub twj tso kua mis NaK yog ib hom tshwj xeeb thauj cov protein nyob hauv koj lub cell membranes. NaK twj ua haujlwm los tsim qhov gradient ntawm Na thiab K ions
Lub twj tso kua mis ua dab tsi hauv lub tshuab hluav taws xob nuclear?
Lub hom phiaj ntawm lub reactor coolant twj tso kua mis yog muab yuam thawj coolant ntws mus tshem tawm thiab hloov cov nqi ntawm tshav kub generated nyob rau hauv lub reactor core. Muaj ntau cov qauv tsim ntawm cov twj tso kua mis no thiab muaj ntau cov qauv tsim ntawm thawj lub voj voog coolant
Lub luag haujlwm ntawm ion twj tso kua mis yog dab tsi?
Muaj nuj nqi hauv cov hlwb (los ntawm kev ua haujlwm ntawm lub twj tso kua mis ion, piv txwv li), cov kua dej yuav raug xa rov qab mus rau nws qhov qub concentration thiab lub xeev siab dawb zog. Cov twj tso kua mis tsis tu ncua txav sodium ions tawm ntawm lub cell thiab potassium ions mus rau hauv lub cell