Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?
Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?

Video: Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?

Video: Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?
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Phospholipids nyob rau hauv cov ntshav plasma daim nyias nyias yog npaj hauv ob txheej, hu ua phospholipid bilayer . Cov molecules uas yog hydrophobic tau yooj yim dhau los ntawm plasma daim nyias nyias , yog hais tias lawv me me, vim hais tias lawv yog cov dej-ntxuav zoo li sab hauv ntawm lub daim nyias nyias.

Hauv qhov no, vim li cas lub cell membrane yog bilayer?

Lipid Bilayer Structure Cov lipid bilayer yog ib tug universal feem ntawm tag nrho cov cell daim nyias nyias . Nws lub luag haujlwm tseem ceeb heev vim tias nws cov qauv tsim muaj qhov cuam tshuam uas ua rau thaj tsam ntawm ib qho cell . Cov qauv hu ua "lipid bilayer "vim nws yog tsim los ntawm ob txheej roj hlwb teeb tsa hauv ob daim ntawv.

Tsis tas li ntawd, vim li cas cov plasma membranes tau npaj ua bilayer es tsis yog monolayer? Txij li ob qho tib si sab nrauv thiab sab hauv ntawm a cell yog dej, ob qho tib si daim nyias nyias Qhov chaw yuav tsum yog hydrophilic. Raws li koj tuaj yeem pom, cov no monolayer daim nyias nyias yuav nruj dua tshaj bilayers uas tej zaum yuav yog vim li cas lawv evolved nyob rau hauv extremophilic archaea.

Xav txog qhov no, yog vim li cas phospholipids npaj nyob rau hauv ib tug bilayer?

Hauv no bilayer , cov phospholipids yog npaj yog li ntawd txhua lub taub hau hydrophillic taw qhia sab nraud thiab cov tails hydrophobic taw qhia sab hauv. Qhov no kev npaj los txog vim hais tias cov cheeb tsam sab nraud thiab sab hauv koj lub cell feem ntau yog dej, yog li cov tails hydrophobic raug yuam kom ua.

Dab tsi ua rau lub cell membrane kua dej?

Cell membrane yog kua dej vim hais tias ib tug neeg phospholipid molecules thiab cov proteins tau diffuse nyob rau hauv lawv cov monolayer thiab yog li txav mus los. Lub fluidity yog cuam tshuam los ntawm: qhov ntev ntawm fatty acid saw. Ntawm no, qhov luv ntawm cov saw hlau ntau dua kua dej yog cov daim nyias nyias.

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