Video: Lub cell membrane thiab nws txoj haujlwm yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov cell membrane yog multifaceted daim nyias nyias lub hnab ntawv a cell cov cytoplasm. Nws tiv thaiv kev ncaj ncees ntawm cov cell nrog rau kev txhawb nqa cell thiab pab tswj lub cell cov puab. Proteins thiab lipids yog cov khoom tseem ceeb ntawm cov tshuaj cell membrane.
Tsis tas li ntawd, lub luag haujlwm ntawm lub cell membrane yog dab tsi?
Qhov tseem ceeb muaj nuj nqi ntawm plasma daim nyias nyias yog los tiv thaiv cell los ntawm nws ib puag ncig. Ua los ntawm ib tug phospholipid bilayer nrog embedded proteins, lub plasma daim nyias nyias yog xaiv permeable rau ions thiab organic molecules thiab tswj kev txav ntawm cov khoom hauv thiab tawm ntawm hlwb.
Kuj Paub, ob txoj haujlwm ntawm lub cell membrane yog dab tsi? Cov cell membrane , yog li ntawd, muaj ob lub luag haujlwm : ua ntej, los ua ib tug barrier khaws cov constituents ntawm lub cell nyob rau hauv thiab pliaj tshuaj tawm thiab, thib ob, los ua lub rooj vag tso cai thauj mus rau hauv lub cell ntawm qhov tseem ceeb cov as-ham thiab txav los ntawm lub cell ntawm cov khoom pov tseg.
Qhov thib ob, 3 lub luag haujlwm ntawm lub cell membrane yog dab tsi?
Cov kab mob lom neeg muaj peb lub luag haujlwm tseem ceeb: (1) lawv khaws cov tshuaj lom neeg tawm ntawm tes; (2) lawv muaj cov receptors thiab cov channel uas tso cai rau cov molecules tshwj xeeb, xws li ions, cov as-ham , pov tseg, thiab cov khoom lag luam metabolic, uas kho cov haujlwm ntawm cellular thiab extracellular kom dhau ntawm cov organelles thiab nruab nrab ntawm cov
Dab tsi yog cov khoom ntawm cov cell membrane thiab lawv ua haujlwm li cas?
Cov khoom tseem ceeb ntawm cov plasma membrane yog lipids ( phospholipids thiab cov cholesterol), cov proteins , thiab carbohydrates. Lub plasma membrane tiv thaiv cov khoom hauv lub cev los ntawm ib puag ncig extracellular. Lub plasma membrane mediates cellular txheej txheem los ntawm kev tswj cov ntaub ntawv nkag mus thiab tawm ntawm lub cell.
Pom zoo:
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