Video: Puas yog glycerol xav tau daim nyias nyias nyias kom hla daim nyias nyias?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
glycerol yog lipid soluble ces nws diffuses yooj yim diffusion ncaj qha los ntawm lub cell daim nyias nyias thaum cov piam thaj yog cov polar molecule yog li nws diffuses ntawm kev yooj yim diffusion uas txhais tau tias nws xav tau ib channel protein ntau ua hauj lwm thiab qhov no txhais tau hais tias thaj chaw saum npoo rau cov piam thaj kom nkag mus yog tsawg dua li ib qho rau glycerol.
Ib yam li ntawd, koj tuaj yeem nug, cov protein puas tuaj yeem dhau los ntawm cov cell membrane?
Membrane proteins Cov cell membrane yog selectively permeable. Cov molecules loj xws li qabzib xav tau kev thauj mus los tshwj xeeb protein ntau los pab txhawb lawv txoj kev txav mus thoob lub cell membrane . Loj heev molecules xws li cov proteins loj dhau mus los ntawm lub cell membrane uas yog hais tias yuav impermeable rau lawv.
Kuj Paub, dab tsi yog 3 proteins nyob rau hauv lub cell membrane? Raws li lawv cov qauv, muaj lub ntsiab peb hom ntawm membrane proteins : thawj tus yog integral daim nyias nyias protein uas yog nyob mus ib txhis anchored los yog ib feem ntawm lub daim nyias nyias , hom thib ob yog peripheral daim nyias nyias protein uas tsuas yog txuas rau ib ntus rau lipid bilayer lossis rau lwm qhov sib xyaw cov proteins , thiab peb
Tsis tas li lo lus nug yog, ua li cas cov proteins koom nrog daim nyias nyias?
Cov protein Sib tham nrog Membranes Hauv Txoj Kev Sib Txawv Feem ntau qhov tseem ceeb cov proteins muaj cov residues nrog hydrophobic sab chains uas cuam tshuam nrog fatty acyl pawg ntawm cov daim nyias nyias phospholipids, yog li anchoring lub protein rau tus daim nyias nyias . Qhov tseem ceeb tshaj plaws cov proteins Tshaj tag nrho phospholipid bilayer.
Dab tsi molecules tuaj yeem dhau los ntawm cell membrane?
Cov qauv ntawm lipid bilayer tso cai rau me me, tsis muaj cov khoom siv xws li oxygen thiab carbon dioxide, thiab hydrophobic. molecules xws li lipids, rau dhau ntawm lub cell membrane , down lawv concentration gradient, los ntawm yooj yim diffusion.
Pom zoo:
Puas yog nws muaj tseeb tias nyob rau hauv kev thauj mus los ntawm kev txav ntawm cov khoom hla ib daim nyias nyias yuav tsum muaj zog?
Hauv kev thauj mus los passive, kev txav ntawm cov khoom hla ib daim nyias nyias yuav tsum muaj zog. _ Muaj tseeb_ 5. Endocytosis yog ib txoj kev uas ib lub cell membrane nyob ib puag ncig thiab siv cov khoom los ntawm ib puag ncig. Ib daim nyias nyias uas tso cai rau qee cov ntaub ntawv dhau los qhia txog kev xaiv permeability
Yuav ua li cas yog lub hom phiaj ntawm carrier proteins nyob rau hauv daim nyias nyias?
Muaj nuj nqi. Cov cab kuj muaj protein ntau pab txhawb kev nthuav tawm ntawm cov molecules hla lub cell membrane. Cov protein yog imbedded nyob rau hauv lub cell membrane thiab npog tag nrho cov membrane. Qhov no yog qhov tseem ceeb vim tias tus neeg nqa khoom yuav tsum thauj cov molecule hauv thiab tawm ntawm lub cell
Dab tsi yog ib qho laj thawj uas ib lub xovtooj yuav tsum tau tswj cov dej ntws hla ntawm daim nyias nyias?
Dab tsi yog ib qho laj thawj uas lub cell yuav tsum tswj cov flowacross daim nyias nyias? Lub nucleus yuav tsum coj mus rau hauv DNA. Lub cell xav tau cov pa roj carbon dioxide ua lub zog. Cov cytoplasmneeds coj cov organelles
Puas tuaj yeem pab txav khoom hla ntawm daim nyias nyias?
Kev thauj cov proteins sib xyaw ua ke rau hauv cov cell membrane feem ntau xaiv ntau yam txog cov tshuaj uas lawv tso cai hla. Qee qhov ntawm cov proteins no tuaj yeem txav cov ntaub ntawv hla ntawm daim nyias nyias tsuas yog thaum pab los ntawm cov concentration gradient, ib hom kev thauj mus los-pab hu ua kev yooj yim diffusion
Qhov kev hloov pauv hauv daim nyias nyias ua rau muaj peev xwm ua tau li cas?
Kev ua haujlwm muaj peev xwm tshwm sim thaum sib txawv ions hla lub paj hlwb. Ib qho kev txhawb nqa ua ntej ua rau sodium channel qhib. Vim tias muaj ntau ntau sodium ions nyob rau sab nraud, thiab sab hauv ntawm cov neuron yog qhov tsis zoo rau sab nraud, sodium ions maj nrawm rau hauv cov neuron