Puas yog plasma membrane permeable rau chlorine ion?
Puas yog plasma membrane permeable rau chlorine ion?

Video: Puas yog plasma membrane permeable rau chlorine ion?

Video: Puas yog plasma membrane permeable rau chlorine ion?
Video: The Basics - Ketamine 2024, Hlis ntuj nqeg
Anonim

Cov daim nyias nyias yog heev permeable rau non-polar (fat-soluble) molecules. Cov permeability ntawm daim nyias nyias rau polar (dej soluble) molecules yog tsawg heev, thiab cov permeability tshwj xeeb tshaj yog tsawg rau polar molecules loj. Cov permeability rau them cov hom molecular ( ions ) yog tsawg heev.

Ib yam li ntawd, nws tau nug, puas yog lub plasma membrane permeable rau oxygen?

Yooj Yim Diffusion thoob plaws Cell ( Plasma ) Membrane . Cov qauv ntawm cov lipid bilayer tso cai rau me me, tsis muaj cov khoom siv xws li oxygen thiab carbon dioxide, thiab hydrophobic molecules xws li lipids, kom dhau mus cell membrane , down lawv concentration gradient, los ntawm yooj yim diffusion.

Qhov thib ob, lub plasma membrane impermeable yog dab tsi? Lub phospholipid bilayer - lub hauv paus structural unit ntawm biomembranes - yog qhov tseem ceeb impermeable rau feem ntau dej-soluble molecules, xws li qabzib thiab amino acids, thiab rau ions. Kev thauj mus los ntawm cov molecules thiab ions thoob plaws tag nrho cov cellular membrane yog kho los ntawm kev thauj cov proteins txuam nrog lub hauv paus bilayer.

Ntawm no, puas yog plasma membrane permeable rau starch?

Ib tug xaiv permeable daim nyias nyias tsuas yog tso cai rau me me molecules, xws li qabzib lossis amino acids, kom nkag mus tau yooj yim, thiab nws inhibits loj molecules xws li cov protein thiab hmoov nplej dhau los ntawm nws. Cov hmoov txhuv nplej siab raug tshem tawm vim nws muaj qhov loj me me me dua li cov piam thaj thiab iodine.

Vim li cas cov ions Na + thiab Cl tsis tuaj yeem hla lub plasma membrane?

Ntawm qhov tod tes, NaCl muaj nyob raws li hydrated Na+ and Cl - ions nyob rau hauv kev daws, uas yog them thiab nqa ib tug loj hydration plhaub. Tias yog vim li cas nws yuav xav tau ntau lub zog kom lub cev qhuav dej thiab coj lawv los ntawm lipid bilayer. Ions tuaj yeem, txawm li cas los xij, dhau ntawm cellular daim nyias nyias los ntawm cov channel thiab thauj.

Pom zoo: