Puas yooj yim diffusion siv cov protein raws?
Puas yooj yim diffusion siv cov protein raws?

Video: Puas yooj yim diffusion siv cov protein raws?

Video: Puas yooj yim diffusion siv cov protein raws?
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Kev Pom Zoo: Yooj yim Diffusion Cov neeg nqa khoom

Muaj ob hom yooj yim diffusion cov neeg nqa khoom: Channel cov protein thauj tsuas yog dej lossis qee yam ions. Lawv ua yog li los ntawm kev tsim ib protein ntau -lined passageway hla lub membrane. Ntau cov dej molecules los yog ions tuaj yeem hla hauv ib cov ntaub ntawv los ntawm xws li cov channel ntawm tus nqi ceev heev.

Ib yam li ntawd, nws raug nug, puas yog cov proteins uas muaj feem cuam tshuam rau kev nthuav dav?

Channel cov protein , ua gated channel cov protein , thiab carrier cov proteins yog peb hom kev thauj mus los cov proteins uas yog koom nrog hauv kev yooj yim diffusion . Dej channel proteins (aquaporins) tso cai rau cov dej ntws mus rau hauv daim nyias nyias ntawm tus nqi nrawm heev. Ion channel proteins tso cai rau ions diffuse hla lub membrane.

Tsis tas li ntawd, puas yog cov dej xau tau yooj yim diffusion? Lwm cov ntaub ntawv, ib yam nkaus, tuaj yeem cuam tshuam los ntawm cov protein cov channel tsis muaj cov cab kuj - potassium xau channel , piv txwv. Diffusion tsis raug txhais raws li kev thauj mus los passive. Yooj yim nthuav tawm tsis yog thauj txhua. Yooj yim diffusion yog carrier-mediated thauj.

Qhov thib ob, hom protein twg uas pab txhawb kev siv tshuaj?

channel cov protein

Puas yog cov protein xav tau rau kev yooj yim diffusion?

Tsuas yog me me, tsis muaj polar molecules, xws li oxygen thiab carbon dioxide, tuaj yeem nthuav tau yooj yim hla daim nyias nyias. Yog li ntawd, tsis muaj cov molecules nonpolar raug thauj los ntawm cov proteins nyob rau hauv daim ntawv ntawm transmembrane channels. Cov metabolites tsis hloov vim tsis muaj zog xav tau kom yooj yim diffusion.

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