Vim li cas cell membrane tseem hu ua plasma membrane?
Vim li cas cell membrane tseem hu ua plasma membrane?

Video: Vim li cas cell membrane tseem hu ua plasma membrane?

Video: Vim li cas cell membrane tseem hu ua plasma membrane?
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Anonim

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 tus cell membrane thiab qee zaum hu tus plasma daim nyias nyias , vim hais tias yog dab tsi nws yog nyob rau hauv kev sib cuag nrog. Li no, Txhua hlwb yog surrounded los ntawm ib plasma daim nyias nyias.

Piv txwv li, cell membrane los yog plasma membrane yog dab tsi?

Cov cell membrane (tseem hu ua plasma daim nyias nyias (PM) lub cytoplasmic membrane , thiab keeb kwm hu ua plasmalemma) yog kev lom neeg daim nyias nyias uas cais sab hauv ntawm txhua tus hlwb los ntawm ib puag ncig sab nraud (qhov chaw extracellular) uas tiv thaiv cov cell los ntawm nws ib puag ncig.

Tsis tas li ntawd, leej twg muab lub sij hawm plasma membrane? Lub sij hawm 'Plasma membrane' tau muab los ntawm Pfeffer. Nws nyob hauv phab ntsa ntawm tes thiab tseem hu ua cell membrane, plasma lemma lossis cytomembrane. Lo lus 'Plasma lemma' tau muab los ntawm Plower (1931). Nageli thiab Cramer (1855) siv lo lus 'Cell membrane'.

Ib yam li ntawd, tej zaum koj yuav nug, qee zaum cell membrane hu ua dab tsi?

Cov cell membrane yog ib txheej nyias nyias nyob ib ncig ntawm hlwb ntawm txhua yam muaj sia. Nws yog qee zaum hu lub plasma daim nyias nyias los yog cytoplasmic daim nyias nyias . Nws txoj haujlwm tseem ceeb yog cais cov sab hauv hlwb los ntawm sab nraud. Nyob rau hauv tag nrho hlwb , cov cell membrane cais cov cytoplasm sab hauv cell los ntawm nws ib puag ncig.

Lub cell plasma membrane yog dab tsi?

Tag nrho 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.

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