Molecules uas yog hydrophilic, ntawm qhov tod tes, tsis tuaj yeem dhau los ntawm plasma membrane-tsawg kawg yog tsis muaj kev pab-vim lawv yog dej-hlub zoo li sab nrauv ntawm daim nyias nyias, thiab yog li ntawd cais tawm ntawm sab hauv ntawm daim nyias nyias.
Vim li cas thiaj tsis tuaj yeem hydrophilic molecules dhau los ntawm lipid bilayer?
Cov polar loj lossis ionic molecules, uas yog hydrophilic, tsis tuaj yeem hla cov phospholipid bilayer yooj yim. … Them atoms lossis molecules ntawm txhua qhov me me tsis tuaj yeem hla lub cell membrane ntawm qhov yooj yim diffusion raws li cov nqi raug tshem tawm los ntawm hydrophobic tails nyob rau sab hauv ntawm phospholipid bilayer.
Yuav ua li cas hydrophilic molecules hla lub plasma membrane?
Cov plasma membrane yog xaiv tau permeable; hydrophobic molecules thiab me me polar molecules tuaj yeem nthuav tawm los ntawm txheej lipid, tab sis ions thiab cov polar loj molecules tsis tuaj yeem. … Hauv kev thauj mus los yooj yim, hydrophilic molecules khi rau "carrier" protein; qhov no yog ib daim ntawv ntawm kev thauj mus los passive.
Vim li cas thiaj tsis tuaj yeem hydrophilic molecules zoo li them ions thiab polar molecules hla lub plasma membrane?
Cov polar loj lossis ionic molecules, uas yog hydrophilic, tsis tuaj yeem hla cov phospholipid bilayer yooj yim. Them atoms lossis molecules ntawm txhua qhov loj me tsis tuaj yeem hla lub cell membrane ntawm qhov yooj yim diffusion raws li cov nqi yog repelled bycov hydrophobicCov tails nyob rau sab hauv ntawm phospholipid bilayer.
Puas hydrophobic molecules hla lub plasma membrane?
Yog li, cov pa roj (xws li O2 thiab CO2), hydrophobic molecules (xws li benzene), thiab cov polar me me tab sis tsis muaj roj molecules (xws li H 2O thiab ethanol) muaj peev xwm nthuav dav thoob plaws cov ntshav plasma. Lwm cov molecules lom, txawm li cas los xij, tsis tuaj yeem yaj hauv hydrophobic sab hauv ntawm phospholipid bilayer.
