Video: Yuav ua li cas ions thauj mus los ntawm cov cell membrane?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Molecules thiab ions txav spontaneously cia lawv cov concentration gradient (piv txwv li, los ntawm ib cheeb tsam ntawm siab dua mus rau ib cheeb tsam ntawm qis concentration) los ntawm diffusion. Molecules thiab ions tuaj yeem txav tawm tsam lawv cov concentration gradient, tab sis cov txheej txheem no, hu ua active thauj , yuav tsum tau siv lub zog (feem ntau los ntawm ATP).
Hauv qhov no, ua li cas ions dhau los ntawm cov cell membrane?
Lub plasma daim nyias nyias yog selectively permeable; hydrophobic molecules thiab me me polar molecules tuaj yeem sib txawv dhau lipid txheej, tab sis ions thiab loj polar molecules tsis tuaj yeem. Kev tsis sib xws daim nyias nyias proteins pab ions thiab loj polar molecules rau hla dhau tus daim nyias nyias los ntawm passive lossis active thauj.
Ib tug kuj yuav nug, chloride ions thauj mus los ntawm cov hlwb li cas? Cov tshuaj feem ntau tuaj yeem txav mus los hla tus cell membrane ntawm yooj yim diffusion muab lawv me me thiab tsis-polar. Txawm li cas los xij, chloride ions raug them tsis zoo thiab yog li lawv tsis tuaj yeem hla cov membrane cia rau qhov concentration gradient yam tsis muaj kev pab. Yog li ntawd, lawv txav los ntawm kev yooj yim diffusion siv cov cab kuj proteins.
Ib yam li ntawd, nws raug nug, dab tsi yog thauj hla lub cell membrane?
Cov cell membrane yog selectively permeable. Qee qhov me me xws li dej, oxygen thiab carbon dioxide tuaj yeem hla ncaj qha dhau phospholipids hauv cov ntshav cell membrane . Cov molecules loj xws li qabzib xav tau ib qho tshwj xeeb thauj protein kom pab lawv txav mus los hla lub cell membrane.
Yuav ua li cas gases thauj hla ib lub cell membrane?
Yooj yim Diffusion hla tus Cell ( Plasma ) Membrane Cov qauv ntawm cov lipid bilayer tso cai rau cov khoom me me, tsis muaj polar xws li oxygen thiab carbon dioxide kom dhau. dhau tus 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 ammonia thauj mus rau daim siab los ntawm piv txwv li cov leeg?
Qhov tsis muaj tshuaj lom cia thiab thauj daim ntawv ntawm ammonia hauv daim siab yog glutamine. Ammonia yog loaded ntawm glutamine synthetase los ntawm cov tshuaj tiv thaiv, NH3 + glutamate → glutamine. Nws tshwm sim nyob rau hauv yuav luag tag nrho cov ntaub so ntswg ntawm lub cev. Ammonia raug tshem tawm ntawm glutaminase los ntawm cov tshuaj tiv thaiv, glutamine --> NH3 + glutamate
Vim li cas cov cell membrane yuav tsum tau thauj cov proteins?
Kev piav qhia: Lawv pab cov molecules thoob plaws hauv daim nyias nyias ntawm kev thauj mus los, ib txoj kev hu ua kom yooj yim diffusion. Cov proteins no yog lub luag haujlwm rau nqa ions thiab lwm cov molecules me rau hauv lub cell
Lub luag haujlwm ntawm lub cell membrane yog dab tsi thaum lub sijhawm thauj mus los?
Lub cell membrane yog xaiv permeable rau ions thiab organic molecules thiab tswj kev txav ntawm cov khoom hauv thiab tawm ntawm lub hlwb. Lub luag haujlwm tseem ceeb ntawm cov cell membrane yog los tiv thaiv lub cell ntawm nws ib puag ncig. Nws muaj phospholipid bilayer nrog embedded proteins
Lub zog rau kev thauj mus los ntawm qhov twg thiab vim li cas thiaj li xav tau lub zog rau kev thauj mus los?
Kev thauj mus los nquag yog txheej txheem uas yuav tsum tau txav cov molecules tawm tsam qhov concentration gradient. Cov txheej txheem yuav tsum muaj zog. Lub zog rau cov txheej txheem tau txais los ntawm kev rhuav tshem cov piam thaj siv oxygen hauv kev ua pa aerobic. ATP yog tsim thaum ua pa thiab tso tawm lub zog rau kev thauj mus los