Cov plasma membrane yog dab tsi?
Cov plasma membrane yog dab tsi?

Video: Cov plasma membrane yog dab tsi?

Video: Cov plasma membrane yog dab tsi?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

Cov plasma daim nyias nyias , kuj hu ua cell daim nyias nyias , yog daim nyias nyias pom nyob rau hauv tag nrho cov hlwb uas cais cov sab hauv ntawm lub cell los ntawm sab nraud ib puag ncig. Cov plasma daim nyias nyias Nws muaj cov lipid bilayer uas yog semipermeable. Cov plasma daim nyias nyias tswj kev thauj cov khoom nkag thiab tawm ntawm lub cell.

Ua raws li qhov no hauv kev xav, dab tsi yog qhov plasma membrane ntawm lub cell?

Tag nrho cov cell yog surrounded los ntawm ib tug plasma membrane. Lub membrane yog tsim los ntawm phospholipid bilayer txheej txheem rov qab-rau-rov qab. Lub daim nyias nyias kuj tau them rau hauv qhov chaw nrog cov roj cholesterol molecules thiab cov proteins . Lub plasma membrane yog xaiv permeable thiab tswj cov molecules uas tso cai rau nkag mus thiab tawm ntawm lub cell.

Ib sab saum toj no, dab tsi yog 3 lub luag haujlwm ntawm plasma membrane? Tshuaj lom neeg daim nyias nyias muaj peb thawj muaj nuj nqi : (1) lawv khaws cov tshuaj lom neeg tawm ntawm lub cell ; (2) lawv muaj cov receptors thiab cov channel uas tso cai rau cov molecules tshwj xeeb, xws li ions, as-ham, pov tseg, thiab cov khoom lag luam metabolic, uas cuam tshuam cov cellular thiab extracellular kev ua ub no kom dhau ntawm organelles thiab nruab nrab ntawm cov khoom.

Yog li ntawd, plasma membrane luv teb yog dab tsi?

Plasma Membrane Txhais. Cov plasma daim nyias nyias ntawm a cell yog lub network ntawm lipids thiab cov proteins uas tsim cov ciam teb ntawm a cell cov cov ntsiab lus thiab sab nraud ntawm lub cell . Nws yog semi-permeable thiab tswj cov ntaub ntawv uas nkag mus thiab tawm ntawm lub cell . Cov hlwb ntawm txhua yam muaj sia muaj plasma daim nyias nyias.

Vim li cas nws thiaj li hu ua plasma membrane?

Cov ntshav ntshav yog "filling" ntawm lub cell , thiab tuav cov cell cov organelles. Yog li, sab nraud daim nyias nyias ntawm cell yog qee zaum hu ua cell membrane thiab qee zaum hu ua plasma membrane , vim hais tias yog dab tsi nws yog nyob rau hauv kev sib cuag nrog. Yog li ntawd, tag nrho cov hlwb yog surrounded los ntawm ib tug plasma daim nyias nyias.

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