Video: Dab tsi yog tsib kauj ruam koom nrog hauv kev tshaj tawm xov tooj ntawm tes?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Kev sib txuas lus los ntawm extracellular Cov cim feem ntau suav nrog rau rau cov kauj ruam : (1) synthesis thiab (2) tso tawm cov teeb liab molecule los ntawm teeb liab cell ; (3) kev thauj mus los teeb liab mus rau lub hom phiaj cell ; (4) nrhiav kom tau cov teeb liab los ntawm ib qho tshwj xeeb receptor protein; (5) kev hloov pauv hauv cellular metabolism, kev ua haujlwm, lossis kev loj hlob
Tsis tas li ntawd, 5 hom kev taw qhia ntawm tes yog dab tsi?
Cov ntawv ntawm teeb liab Muaj plaub hom tshuaj lom neeg teeb liab pom muaj nyob rau hauv multicellular kab mob: paracrine teeb liab , autocrine ua teeb liab , kab mob endocrine teeb liab , thiab teeb liab los ntawm kev sib cuag ncaj qha.
Qhov thib ob, dab tsi yog cov kauj ruam ntawm kev taw qhia ntawm tes? Peb theem ntawm Cell Signaling ua ntej, txais tos , qhov twg lub teeb liab molecule khi lub receptor. Tom qab ntawd, cov teeb liab transduction, uas yog qhov chaw tshuaj lom neeg teeb liab tshwm sim nyob rau hauv ib tug series ntawm enzyme activations. Thaum kawg, cov lus teb, uas yog cov lus teb ntawm tes.
Tsis tas li lo lus nug yog, dab tsi yog qhov teeb meem ntawm extracellular?
Txhais. Extracellular signaling molecules yog cues, xws li kev loj hlob yam, cov tshuaj hormones, cytokines, extracellular matrix Cheebtsam thiab neurotransmitters, tsim los xa cov ntaub ntawv tshwj xeeb rau cov hlwb.
Dab tsi tso cai rau cov cell teb rau cov tub txib extracellular?
Cells muaj cov proteins hu ua receptors uas khi rau signaling molecules thiab pib physiological teb . Vim tias cov membrane receptors cuam tshuam nrog ob qho tib si extracellular teeb liab thiab molecules nyob rau hauv lub cell , lawv tso cai signaling molecules cuam tshuam cell ua haujlwm yam tsis tau nkag rau hauv cell.
Pom zoo:
Dab tsi yog cov kauj ruam los daws qhov tsis sib xws ntawm ob kauj ruam?
Nws yuav siv ob kauj ruam los daws qhov kev sib npaug lossis qhov tsis sib xws uas muaj ntau tshaj ib qho kev ua haujlwm: Simplify siv qhov sib txawv ntawm qhov sib ntxiv lossis rho tawm. Ua kom yooj yim ntxiv los ntawm kev siv qhov sib txawv ntawm qhov sib npaug lossis faib
Lub organelle twg ua haujlwm raws li qhov chaw xa ntawv ntawm lub xov tooj ntawm tes txheeb cov proteins thiab xa lawv mus rau lawv qhov chaw xav tau sab hauv lossis sab nraud ntawm tes?
Golgi Hais txog qhov no, dab tsi organelle yog lub luag haujlwm rau kev thauj mus los? endoplasmic reticulum (ER Qhov thib ob, cov proteins txav mus los ntawm lub cell li cas? Cov proteins txav mus los endomembrane system thiab raug xa tawm los ntawm lub ntsej muag trans ntawm Golgi apparatus nyob rau hauv thauj vesicles uas txav mus los cytoplasm thiab tom qab ntawd fuse nrog plasma membrane tso tawm protein ntau mus rau sab nraum lub cell .
Dab tsi ntawm lub xov tooj ntawm tes ua raws li qhov chaw tswj kev ua haujlwm ntawm tes?
Lub nucleus muaj cov ntaub ntawv genetic information (DNA) onspecial strands hu ua chromosomes. Function - Lub nucleus yog 'tswj chaw' ntawm lub xovtooj ntawm tes, rau cellmetabolism thiab kev yug me nyuam. Cov kab mob hauv qab no pom muaj nyob rau hauv cov nroj tsuag thiab tsiaj txhu
Dab tsi yog cov theem ntawm cov kauj ruam koom nrog hauv tshuaj evolution?
Raws li ib txoj kev xav, tshuaj evolution tshwm sim nyob rau hauv plaub theem. Nyob rau hauv thawj theem ntawm cov tshuaj evolution, molecules nyob rau hauv lub primitive ib puag ncig tsim yooj yim organic tshuaj, xws li amino acids
Yuav ua li cas cov khoom siv caj ces hauv txhua lub xov tooj tshiab tsim los ntawm kev faib tawm ntawm tes sib piv nrog cov khoom siv caj ces hauv lub xov tooj qub?
Mitosis tshwm sim nyob rau hauv ob lub nuclei uas zoo tib yam rau thawj nucleus. Yog li, ob lub hlwb tshiab tsim tom qab kev faib tawm ntawm tes muaj tib yam khoom siv caj ces. Thaum lub sij hawm mitosis, chromosomes condense los ntawm chromatin. Thaum saib nrog lub microscope, chromosomes pom nyob rau hauv lub nucleus