Cov txheej txheem:
Video: Dab tsi yog cov yam ntxwv ntawm plasma membrane?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho cov hlwb yog surrounded los ntawm ib plasma daim nyias nyias . Cov daim nyias nyias yog tsim los ntawm phospholipid bilayer teem rov qab-rau-rov qab. Cov daim nyias nyias kuj tseem them rau hauv qhov chaw nrog cov roj cholesterol molecules thiab cov proteins. Cov plasma daim nyias nyias yog selectively permeable thiab tswj cov molecules uas tso cai rau nkag mus thiab tawm ntawm cell.
Hauv qhov no, kev ua haujlwm ntawm plasma membrane yog dab tsi?
Qhov tseem ceeb muaj nuj nqi ntawm plasma daim nyias nyias yog tiv thaiv lub cell los ntawm nws ib puag ncig. Ua los ntawm ib tug phospholipid bilayer nrog embedded proteins, lub plasma daim nyias nyias yog xaiv permeable rau ions thiab organic molecules thiab tswj kev txav ntawm cov tshuaj hauv thiab tawm ntawm cov hlwb.
Ib yam li ntawd, nqe lus twg zoo tshaj plaws piav qhia txog plasma membrane? Teb Cov Kws Paub Tseeb Plasma membrane ntawm ib tsob nroj muaj sia cell yog ob chav lipid txheej nrog floating protein molecules. Nws selectively tswj txoj kev ntawm cov tshuaj mus rau hauv lub cell thiab tawm ntawm cell . Nws kuj yog piav los ntawm nqe lus tias cov plasma daim nyias nyias ntawm ib tsob nroj muaj sia cell yog selectively permeable.
Tsis tas li ntawd, peb yam ntxwv ntawm cell membranes yog dab tsi?
Ntsiab Cai
- Lub cell membrane yog ib tug multifaceted membrane uas envelopes ib lub cell lub cytoplasm.
- Proteins thiab lipids yog cov khoom tseem ceeb ntawm cov cell membrane.
- Phospholipids yog ib qho tseem ceeb ntawm cov cell membranes.
- Zoo ib yam li cov cell membrane, qee cov cell organelles nyob ib puag ncig ntawm daim nyias nyias.
Dab tsi yog cov yam ntxwv ntawm lub cell?
Tag nrho hlwb , txawm tias lawv yog prokaryotic lossis eukaryotic, muaj qee yam nta. Cov yam ntxwv ntawm prokaryotic thiab eukaryotic hlwb yog: DNA, cov khoom siv noob caj noob ces muaj nyob rau hauv ib los yog ntau dua chromosomes thiab nyob rau hauv ib cheeb tsam nonmembrane bound nucleoid hauv prokaryotes thiab cov membrane-bound nucleus hauv eukaryotes.
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