Video: Lub vesicle yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv cell biology, ib lub cev yog ib qho qauv hauv lossis sab nraud a cell , muaj cov kua los yog cytoplasm nyob rau hauv ib lub lipid bilayer. Vesicles tsim ib txwm muaj nyob rau hauv cov txheej txheem ntawm secretion (exocytosis), uptake (endocytosis) thiab thauj cov ntaub ntawv nyob rau hauv lub plasma membrane.
Ib yam li ntawd, cov vesicles pom nyob rau hauv dab tsi?
A lub cev yog ib qho me me, kheej kheej qhov sib cais uas yog cais los ntawm cytosol los ntawm tsawg kawg yog ib qho lipid bilayer. Ntau cov hlab ntsha yog tsim nyob rau hauv Golgi apparatus thiab endoplasmic reticulum, los yog yog tsim los ntawm ib feem ntawm lub cell kab mob endocytosis.
Ib yam li ntawd, vesicles thiab vacuoles puas yog tib yam? Vacuoles thiab vacuoles yog cov hnab ntim cov ntaub qhwv uas ua haujlwm hauv kev khaws cia thiab thauj. Vacuoles yog me ntsis loj dua cov hlab ntsha , thiab membrane a vacuole tsis fuse nrog daim nyias nyias ntawm lwm cov cellular Cheebtsam. Vesicles tuaj yeem fuse nrog lwm cov membranes hauv lub cell system (Daim duab 1).
Kuj paub, puas muaj vesicles pom nyob rau hauv cov nroj tsuag lossis tsiaj hlwb?
Nws yog tiag tiag ib pawg ntawm membrane-bound cov hlab ntsha uas yog ib qho tseem ceeb nyob rau hauv ntim macromolecules rau thauj mus rau lwm qhov hauv lub cell . Cov pawg loj dua cov hlab ntsha yog surrounded los ntawm ntau me me cov hlab ntsha muaj cov ntim macromolecules. Lawv muaj ntau nyob rau hauv tsiaj hlwb , tab sis tsis tshua muaj nyob rau hauv cog hlwb.
Yuav ua li cas vesicles tsiv nyob ib ncig ntawm lub cell?
Thoob plaws lub neej ntawm cell ntau yam molecules thiab cargo muaj cov hlab ntsha yog thauj nyob ib ncig ntawm lub cell los ntawm lub cev muaj zog proteins. Cov no txav raws li cov protein filaments siv lawv raws li kev taug kev zoo li lub tsheb ciav hlau locomotive khiav ntawm kev tsheb ciav hlau.
Pom zoo:
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog qhov txawv ntawm Marine West Coast huab cua thiab dab tsi yog lub luag haujlwm rau cov yam ntxwv ntawd?
Cov ntsiab lus ntawm Marine West Coast Qhov kev nyab xeeb ntawm cov yam ntxwv tseem ceeb yog lub caij ntuj sov me me thiab lub caij ntuj no thiab cov nag lossis daus txhua xyoo. Qhov ecosystem no muaj kev cuam tshuam loj heev los ntawm nws qhov ze rau ntawm ntug dej hiav txwv thiab roob. Nws yog qee zaum hu ua huab cua sab hnub poob ntug dej hiav txwv lossis dej hiav txwv huab cua
Dab tsi yog tsib lub hauv paus Circuit Court Cheebtsam lawv lub tsev yog dab tsi?
Cov no yog cov feem ntau siv: resistors. Capacitors. LEDs. Transistors. Inductors. Integrated Circuits
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua