Video: Dab tsi yog ob txheej ntawm cell membrane hu ua?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
phospholipids
Hauv qhov no, ob txheej dab tsi ua rau lub cell membrane?
Phospholipids yog hom lipid ntau tshaj plaws nyob rau hauv lub daim nyias nyias . Phospholipids yog tsim nce ntawm ob txheej , sab nrauv thiab sab hauv txheej . Sab hauv txheej yog ua los ntawm hydrophobic fatty acid tails, thaum sab nrauv txheej ua nce ntawm hydrophilic polar taub hau uas taw tes rau hauv dej.
Qhov thib ob, lub cell membrane qauv yog dab tsi? Phospholipids tsim cov hauv paus qauv ntawm a cell membrane . Qhov kev npaj ntawm phospholipid molecules ua rau lub lipid bilayer. Phospholipids ntawm a 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.
Ua kom pom qhov no, vim li cas lub membrane yog ob txheej?
Hauv ib daim nyias nyias , muaj hydrophilic sab saum toj thiab hauv qab, thaum sab hauv muaj hydrophobic tails clumped ua ke. Txij li thaum hydrophilic "sab nraum" ntawm lub daim nyias nyias yog polar, lawv yog attracted rau lwm cov polar molecules xws li dej.
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.
Pom zoo:
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