Cov txheej txheem:
Video: Dab tsi ua rau lub bilayer?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Phospholipids ua lub hauv paus qauv ntawm lub cell membrane. Qhov kev npaj ntawm phospholipid molecules ua cov lipid bilayer . Cov phospholipids ntawm lub cell membrane yog teem rau hauv ob txheej hu ua lipid bilayer . Lub taub hau hydrophilic phosphate yeej ib txwm npaj kom lawv nyob ze dej.
Tsis tas li ntawd, cov khoom ntawm phospholipid bilayer yog dab tsi?
Lipid txheej
- Lub lipid bilayer (los yog phospholipid bilayer) yog ib daim nyias nyias nyias ua los ntawm ob txheej ntawm lipid molecules.
- Biological bilayers feem ntau yog tsim los ntawm amphiphilic phospholipids uas muaj lub taub hau hydrophilic phosphate thiab ib tug hydrophobic tail uas muaj ob lub fatty acid chains.
Tom qab ntawd, lo lus nug yog, lub cell membrane yog dab tsi? Cov Cell Membrane . Txhua tus nyob hlwb thiab ntau yam me me organelles nyob rau hauv hlwb yog bounded los ntawm nyias daim nyias nyias . Cov no daim nyias nyias yog tsim Feem ntau ntawm phospholipids thiab cov proteins thiab feem ntau piav raws li phospholipid bi-layers.
Raws li, yuav ua li cas lipid bilayer tsim?
Ua cylindrical, phospholipid cov molecules spontaneously daim ntawv bilayers nyob rau hauv aqueous ib puag ncig. Nyob rau hauv qhov kev ua kom muaj zog tshaj plaws, qhov zoo tshaj plaws, lub taub hau hydrophilic ntsib cov dej ntawm txhua qhov chaw ntawm lub qhov dej. bilayer , thiab cov tails hydrophobic yog shielded los ntawm dej nyob rau hauv sab hauv.
Vim li cas cell membranes muaj ob txheej?
Thaum twg cellular daim nyias nyias daim ntawv, phospholipids sib sau ua ke ob txheej vim hais tias ntawm no hydrophilic thiab hydrophobic zog. Cov phosphate taub hau hauv txhua qhov txheej fim lub aqueous los yog watery ib puag ncig ntawm ob sab, thiab cov tails nkaum deb ntawm cov dej ntawm lub txheej ntawm taub hau, vim lawv yog hydrophobic.
Pom zoo:
Vim li cas lub cell membrane teem nyob rau hauv ib tug bilayer?
Cov phospholipids nyob rau hauv lub plasma membrane yog teem nyob rau hauv ob txheej, hu ua phospholipid bilayer. Cov molecules uas yog hydrophobic tuaj yeem yooj yim dhau los ntawm cov plasma membrane, yog tias lawv me txaus, vim tias lawv yog cov dej-ntxhais zoo li sab hauv ntawm daim nyias nyias
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Lipid Bilayer Structure Lub lipid bilayer yog ib qho universal feem ntawm tag nrho cov cell membranes. Nws lub luag haujlwm tseem ceeb heev vim tias nws cov qauv tsim muaj qhov cuam tshuam uas ua rau cov ciam teb ntawm lub xov tooj ntawm tes. Cov qauv hu ua 'lipid bilayer' vim tias nws yog tsim los ntawm ob txheej ntawm cov roj ntsha hauv ob daim ntawv