Yuav ua li cas ions thauj mus los ntawm cov cell membrane?
Yuav ua li cas ions thauj mus los ntawm cov cell membrane?

Video: Yuav ua li cas ions thauj mus los ntawm cov cell membrane?

Video: Yuav ua li cas ions thauj mus los ntawm cov cell membrane?
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Molecules thiab ions txav spontaneously cia lawv cov concentration gradient (piv txwv li, los ntawm ib cheeb tsam ntawm siab dua mus rau ib cheeb tsam ntawm qis concentration) los ntawm diffusion. Molecules thiab ions tuaj yeem txav tawm tsam lawv cov concentration gradient, tab sis cov txheej txheem no, hu ua active thauj , yuav tsum tau siv lub zog (feem ntau los ntawm ATP).

Hauv qhov no, ua li cas ions dhau los ntawm cov cell membrane?

Lub plasma daim nyias nyias yog selectively permeable; hydrophobic molecules thiab me me polar molecules tuaj yeem sib txawv dhau lipid txheej, tab sis ions thiab loj polar molecules tsis tuaj yeem. Kev tsis sib xws daim nyias nyias proteins pab ions thiab loj polar molecules rau hla dhau tus daim nyias nyias los ntawm passive lossis active thauj.

Ib tug kuj yuav nug, chloride ions thauj mus los ntawm cov hlwb li cas? Cov tshuaj feem ntau tuaj yeem txav mus los hla tus cell membrane ntawm yooj yim diffusion muab lawv me me thiab tsis-polar. Txawm li cas los xij, chloride ions raug them tsis zoo thiab yog li lawv tsis tuaj yeem hla cov membrane cia rau qhov concentration gradient yam tsis muaj kev pab. Yog li ntawd, lawv txav los ntawm kev yooj yim diffusion siv cov cab kuj proteins.

Ib yam li ntawd, nws raug nug, dab tsi yog thauj hla lub cell membrane?

Cov cell membrane yog selectively permeable. Qee qhov me me xws li dej, oxygen thiab carbon dioxide tuaj yeem hla ncaj qha dhau phospholipids hauv cov ntshav cell membrane . Cov molecules loj xws li qabzib xav tau ib qho tshwj xeeb thauj protein kom pab lawv txav mus los hla lub cell membrane.

Yuav ua li cas gases thauj hla ib lub cell membrane?

Yooj yim Diffusion hla tus Cell ( Plasma ) Membrane Cov qauv ntawm cov lipid bilayer tso cai rau cov khoom me me, tsis muaj polar xws li oxygen thiab carbon dioxide kom dhau. dhau tus cell membrane , down lawv concentration gradient, los ntawm yooj yim diffusion.

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