Video: Dynamic instability txhais li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Tsis ruaj khov yog kev hloov pauv ntawm kev loj hlob (poly- merizing) thiab shrinking (depolymerizing) xeev hauv vivo. Microtubules yog ib feem ntawm ntau cov txheej txheem tseem ceeb ntawm tes suav nrog kev tsim tawm thiab gameteo-genesis.
Tom qab ntawd, vim li cas kev ruaj ntseg tsis tseem ceeb tseem ceeb?
Tsis ruaj khov tso cai rau lub cell hloov kho sai sai ntawm cytoskeleton thaum tsim nyog. Lub cell siv lub zog kom lub concentration ntawm GTP-tubulin siab tshaj qhov tseem ceeb concentration rau polymerization, deb ntawm equilibrium, thiaj li hais tias subunits sai nrog microtubule kawg thiab cov microtubules loj hlob.
Tsis tas li ntawd, puas Microfilaments muaj dynamic instability? Lawv yog microfilaments , microtubules thiab intermediate filaments. Microfilaments yog actin polymers ntawm ~ 7nm dav. Microtubules yog kuj heev dynamic , tab tom hloov pauv sai ntawm polymerization thiab depolymerization hauv cov txheej txheem hu ua tsis ruaj khov dynamic.
Nyob rau hauv no txoj kev, dab tsi ua rau dynamic instability?
Dynamic instability hais txog kev sib koom ua ke ntawm kev sib dhos thiab disassembly ntawm qhov kawg ntawm microtubule. Microtubule tuaj yeem ua tau dynamically hloov ntawm cov theem loj hlob thiab shrinking nyob rau hauv cheeb tsam no. Tubulin dimers tuaj yeem khi ob lub molecules ntawm GTP, ib qho tuaj yeem ua hydrolyzed tom qab sib dhos.
Yuav ua li cas microtubules dynamic?
Microtubules yog heev dynamic thiab yuav nquag loj hlob thiab txo qis ntawm qhov nrawm tsis tas li. Thaum lub sijhawm tshwm sim no, hu ua ' dynamic tsis muaj kev ruaj ntseg ', tubulin subunits yuav ob leeg koom ua ke thiab sib cais los ntawm qhov ntxiv rau qhov kawg ntawm protofilament [3].
Pom zoo:
Kev txhais lus kho mob txhais li cas?
Los ntawm Wikipedia, phau ntawv txhais lus pub dawb. Cov lus kho mob yog cov lus siv los piav qhia meej txog tib neeg lub cev suav nrog nws cov khoom, txheej txheem, cov xwm txheej cuam tshuam rau nws, thiab cov txheej txheem ua rau nws. Cov lus siv kho mob tau siv hauv thaj chaw tshuaj
Kev txhais lus tsis hnov lus txhais li cas?
Kev hnov pob ntseg, tseem hu ua kev hnov lus tsis zoo, yog ib feem lossis tag nrho tsis muaj peev xwm hnov tau. Ib tug neeg lag ntseg tsis hnov me ntsis. Kev hnov pob ntseg raug kuaj pom thaum kuaj lub suab pom tias ib tus neeg tsis tuaj yeem hnov 25 decibels tsawg kawg ib pob ntseg
Nws txhais li cas yog tias ntshav siab sib txawv hauv txhua txhais caj npab?
Lawv kuj muaj kev pheej hmoo ntau ntxiv ntawm kev txhim kho kab mob plawv thiab cuam tshuam txog teeb meem nyob rau 13 xyoos tom ntej. Qhov sib txawv loj hauv kev ntsuas ntshav siab ntawm koj txhais caj npab tuaj yeem yog ib qho cim ntawm teeb meem kev noj qab haus huv, xws li: Cov hlab ntshav txhaws hauv koj txhais caj npab (kab mob hlab ntsha hauv nruab nrog cev) Kab mob hauv lub raum
Npau suav txog plaub txhais taw txhais li cas?
Lub ntsiab lus & piav qhia rau Hairy Feet phau ntawv txhais lus! Yog tias muaj dab tsi tshwm sim rau ib txhais taw hauv kev npau suav, nws yuav cuam tshuam txog nws cov nyiaj txiag sawv, ua haujlwm, ua haujlwm hnyav, nws tus thawj coj lossis nws cov neeg sawv cev. Yog tias ib tus pom nws txhais taw taw rau saum ntuj hauv npau suav, nws tuaj yeem qhia txog kev tuag ntawm nws tus menyuam
Vim li cas microtubules muaj dynamic instability?
Dynamic instability tso cai rau lub cell kom sai reorganize lub cytoskeleton thaum tsim nyog. Lub xovtooj siv hluav taws xob txhawm rau ua kom cov concentration ntawm GTP-tubulin siab dua qhov tseem ceeb rau cov polymerization, nyob deb ntawm qhov sib npaug, yog li cov subunits koom nrog microtubule xaus thiab microtubules loj hlob