2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov me me uas tsis muaj qhov polar molecules, xws li H2 O, kuj tuaj yeem nthuav tawm los ntawm daim nyias nyias, tab sis loj dua cov polar molecules, xws li qabzib , ua tsis tau. Charged molecules, xws li ions, tsis muaj peev xwm mus diffuse los ntawm ib tug phospholipid bilayer phospholipid bilayer Lub lipid bilayer (los yog phospholipid bilayer) yog ib tug nyias nyias nyias nyias ua los ntawm ob txheej ntawm lipid molecules. Cov daim nyias nyias no yog cov ntawv tiaj tus uas ua rau muaj kev cuam tshuam tsis tu ncua nyob ib puag ncig txhua lub hlwb. … Ib yam li lub taub hau, cov tails ntawm lipids kuj tuaj yeem cuam tshuam rau cov khoom ntawm daim nyias nyias, piv txwv li los ntawm kev txiav txim siab theem ntawm lub bilayer. https://en.wikipedia.org › wiki › Lipid_bilayer
Lipid bilayer - Wikipedia
tsis hais qhov loj me; Txawm tias H+ ions tsis tuaj yeem hla lub lipid bilayer los ntawm kev nthuav tawm dawb.
Yuav ua li cas 3 molecules tsis tau yooj yim dhau ntawm daim nyias nyias?
Cov plasma membrane yog xaiv tau permeable; hydrophobic molecules thiab me me polar molecules tuaj yeem sib kis los ntawm cov lipid txheej, tab sis ions thiab loj polar molecules tsis tuaj yeem.
Dab tsi tuaj yeem thiab tsis tuaj yeem dhau ntawm cov cell membrane?
Cell membranes ua haujlwm thaiv thiab thaiv qhov rooj. Lawv yog cov semi-permeable, uas txhais tau hais tias qee cov molecules tuaj yeem kis thoob plaws lipid bilayer tab sis lwm tus tsis tuaj yeem. Me me hydrophobic molecules thiab gases zoo li oxygen thiab carbon dioxide hla daim nyias nyias.
Yam tshuaj twgTsis tuaj yeem hla lub cell membrane yooj yim?
Loj polar lossis ionic molecules, uas yog hydrophilic, tsis tuaj yeem yooj yim hla phospholipid bilayer. Them atoms lossis molecules ntawm txhua qhov me me tsis tuaj yeem hla lub cell membrane ntawm qhov yooj yim diffusion raws li cov nqi raug tshem tawm los ntawm cov tails hydrophobic nyob rau sab hauv ntawm phospholipid bilayer.
Cov molecules twg tuaj yeem dhau ntawm cell membrane?
Dej, carbon dioxide, thiab oxygen yog ib qho ntawm ob peb lub molecules yooj yim uas tuaj yeem hla cov cell membrane los ntawm kev nthuav dav (los yog hom kev sib txawv hu ua osmosis).
Pom zoo:
Vim li cas thiaj tsis tuaj yeem hydrophilic molecules hla cov plasma membrane?
Molecules uas yog hydrophilic, ntawm qhov tod tes, tsis tuaj yeem dhau los ntawm plasma membrane-tsawg kawg yog tsis muaj kev pab-vim lawv yog dej-hlub zoo li sab nrauv ntawm daim nyias nyias, thiab yog li ntawd cais tawm ntawm sab hauv ntawm daim nyias nyias.
Ntawm twg ntawm cov ntses hauv qab no ampulla ntawm lorenzini tsis tuaj?
Lizard, qav, thiab luav tsis muaj ampullae ntawm Lorenzini vim lawv muaj lwm yam kabmob. Yog li, lo lus teb raug yog "Option A". Nco tseg: Elasmobranchii yog cov subclass ntawm cartilaginous ntses uas muaj sharks thiab rays. Pob ntses muaj ampullae ntawm Lorenzini?
Qhov twg yog qhov kev sib raug zoo ntawm stereochemical ntawm ob khub ntawm cov molecules?
Enantiomers thiab diastereomers tsuas yog ob qho kev sib raug zoo stereochemical uas koj tuaj yeem muaj ntawm ob lub molecules. Cov stereoisomers yog ob lub molecules uas ua tiav ob qhov kev xav tau hauv qab no: Ob lub molecules yuav tsum muaj tib lub qauv molecular, thiab.
Puas yog qhov tsis zoo ntawm qhov tsis txaus ntseeg tuaj yeem ntsuas tau hauv cov menyuam kawm ntawv preschool?
Cov pov thawj dav dav qhia pom tias qhov siab Callous-Unemotional (CU) zoo nyob rau hauv thaum yau thiab cov hluas tuaj yeem txhim khu kev txheeb xyuas cov tib neeg muaj kev pheej hmoo rau kev tawm tsam kev sib raug zoo. Txoj kev tshawb fawb tam sim no hais txog kev tshawb nrhiav qhov tsis sib xws los ntawm kev tshawb xyuas cov qauv ntawm CU tus cwj pwm hauv cov menyuam yaus hnub nyoog preschool.
Puas tuaj yeem nce thiab dhau qhov chaw nres tsheb tuaj yeem siv tau?
Up thiab tshaj (retractable) Feem ntau suav hais tias hom chaw nres tsheb yooj yim tshaj plaws rau automate, thiab kuj yog tus nqi zoo tshaj plaws, ib yam nkaus. Txhawm rau ua kom lub qhov rooj no ua haujlwm tau zoo, lub boom raug teeb tsa saum toj ntawm cov qauv qhib thiab, ntawm qhov kawg, lub tshuab hluav taws xob tau teeb tsa.
