Puas yog sodium poov tshuaj twj tso kua mis active lossis passive?
Puas yog sodium poov tshuaj twj tso kua mis active lossis passive?

Video: Puas yog sodium poov tshuaj twj tso kua mis active lossis passive?

Video: Puas yog sodium poov tshuaj twj tso kua mis active lossis passive?
Video: tsaus ntuj chim no tseem nco nco koj.nkauj tawm tshiab. 2024, Kaum ib hlis
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Sodium-Potassium Pump. Cov txheej txheem ntawm kev txav sodium thiab potassium ions hla lub cell membrance yog ib qho kev thauj mus los cov txheej txheem cuam tshuam nrog hydrolysis ntawm ATP los muab lub zog tsim nyog.

Yog li ntawd, yog vim li cas sodium poov tshuaj twj tso kua mis active thauj?

Cov sodium - poov tshuaj twj tso kua mis yog ib qho piv txwv ntawm kev thauj mus los vim hais tias lub zog yuav tsum tau txav mus sodium thiab poov tshuaj ions tiv thaiv cov concentration gradient. Pom cov concentrations ntawm poov tshuaj thiab sodium ions sab hauv thiab sab nraud cell.

Tom qab, lo lus nug yog, dab tsi yog lub ntsiab lus ntawm sodium poov tshuaj twj tso kua mis? Cov sodium poov tshuaj twj tso kua mis yog ib hom kev thauj khoom tshwj xeeb uas pom muaj nyob hauv koj cov cell membranes. Lub cell membrane yog lub semi-permeable txheej barrier ntawm ntau lub cell. The NaK twj txoj hauj lwm yog tsiv mus poov tshuaj ions mus rau hauv lub cell thaum ib txhij tsiv sodium ions tawm ntawm lub cell.

Ntawm no, hom channel twg yog sodium potassium twj tso kua mis?

Cov sodium – poov tshuaj twj tso kua mis muaj nyob rau hauv ntau lub cell (plasma) daim nyias nyias. Powered los ntawm ATP, lub twj txav sodium thiab poov tshuaj ions nyob rau hauv opposite lus qhia, txhua tus tiv thaiv nws concentration gradient. Nyob rau hauv ib lub voj voog ntawm cov twj , peb sodium ions yog extruded los ntawm thiab ob poov tshuaj ions raug xa mus rau hauv lub cell.

Qhov piv txwv ntawm lub neej tiag tiag ntawm kev thauj mus los yog dab tsi?

Ib txhia piv txwv ntawm kev thauj mus los yog endocytosis, exocytosis thiab siv lub cell membrane twj tso kua mis; diffusion, osmosis thiab yooj yim diffusion yog tag nrho piv txwv ntawm passive thauj . Txij li thaum kev thauj mus los mus tawm tsam dab tsi molecules nyiam ua, nws yuav tsum muaj qhov chaw ntawm lub zog ntawm tes, xws li adenosine triphosphate.

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