Video: Dab tsi tuaj yeem dhau los ntawm phospholipids sai sai?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ions, xws li hydrogen ions, thiab hydrophilic molecules, xws li dej thiab qabzib, tsis tuaj yeem nrawm dhau ncaj qha los ntawm phospholipids ntawm lub plasma membrane. txav mus nrawm dhau lub membrane, lawv yuav tsum hla dhau membrane thauj cov protein. Osmosis yog kev thauj mus los ntawm dej.
Raws li, yam khoom twg tuaj yeem dhau los ntawm phospholipid bilayer?
Lipid -soluble molecules ua tau npaj txhij hla dhau a lipid daim tawv nqaij . Piv txwv suav nrog cov roj molecules xws li oxygen (O2) thiab carbon dioxide (CO2), steroid molecules, thiab fat-soluble vitamins (A, D, E, thiab K).
Tom qab ntawd, lo lus nug yog, dab tsi 3 molecules tsis tau yooj yim dhau los ntawm daim nyias nyias? Lub plasma daim nyias nyias yog selectively permeable; hydrophobic molecules thiab me polar molecules tau diffuse dhau cov lipid txheej, tab sis ions thiab loj polar molecules ua tsis tau . Kev tsis sib xws daim nyias nyias proteins pab ions thiab polar loj molecules rau dhau los ntawm daim nyias nyias los ntawm passive lossis active thauj.
Hais txog qhov no, hom molecules twg dhau los ntawm cov cell membrane yooj yim tshaj plaws?
Me me hydrophobic molecules thiab gases zoo li oxygen thiab carbon dioxide hla daim nyias nyias ceev ceev. Me polar molecules , xws li dej thiab ethanol, kuj tuaj yeem dhau los ntawm daim nyias nyias , tab sis lawv ua qeeb dua.
Dab tsi ntawm cov molecules hauv qab no tuaj yeem dhau los ntawm lipid bilayer?
Thauj Hla Membranes Piv txwv li, hydrophobic (dej-ntxub) molecules, xws li carbon dioxide ( CO2 ) thiab oxygen (O2), tuaj yeem yooj yim dhau los ntawm lipid bilayer, tab sis ions xws li calcium (Ca2+) thiab polar molecules xws li dej (H2O) ua tsis tau.
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