![Yuav ua li cas cov leeg sib zog tshwm sim ntawm ib leeg cov qib fiber ntau? Yuav ua li cas cov leeg sib zog tshwm sim ntawm ib leeg cov qib fiber ntau?](https://i.answers-medical.com/preview/medical-health/13866372-how-a-muscle-contraction-happens-on-a-single-muscle-fiber-level-j.webp)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Kev cog lus ntawm a Nqaij Fiber . Ib daim ntawv hla tus choj ntawm actin thiab lub taub hau myosin ua rau kev cog lus . Tsuav yog Ca ++ ions nyob hauv sarcoplasm los khi rau troponin, thiab tsuav yog ATP muaj, nqaij leeg yuav txuas ntxiv kom luv.
Thiaj li, cov txheej txheem ntawm cov leeg sib cog lus yog dab tsi?
Nqaij leeg tshwm sim thaum cov actin nyias thiab tuab myosin filaments swb dhau ib leeg. Feem ntau yog xav tias qhov no txheej txheem tau tsav los ntawm tus ntoo khaub lig hla uas txuas los ntawm myosin filaments thiab cuam tshuam nrog kev cuam tshuam nrog cov actin filaments raws li ATP yog hydrolysed.
Tom qab ntawd, lo lus nug yog, cov leeg nqaij ua haujlwm li cas? Nqaij cov cell muaj cov protein ntau filaments ntawm actin thiab myosin uas swb dhau ib leeg, ua rau muaj qhov sib cog uas hloov pauv qhov ntev thiab cov duab ntawm lub cell. Nqaij muaj nuj nqi los tsim quab yuam thiab txav mus los. Pob txha nqaij nyob rau hauv lem tuaj yeem faib ua twitch qeeb thiab qeeb fibers.
Ua qhov no hauv kev txiav txim siab, dab tsi yog qhov sib npaug ntawm cov leeg sib tw?
Ib qib nqaij lus teb tso cai hloov hauv nqaij nro. Summation tshwm sim raws li kev txhawb nqa txuas ntxiv tau ntxiv ua ke los tsim kom muaj zog dua nqaij leeg . Ua kom tus naj npawb ntawm lub cev muaj zog neurons koom nrog ua rau tus lej ntawm cov tshuab ua haujlwm tau qhib hauv a nqaij , uas yog hu ua kev nrhiav neeg ua haujlwm.
Lub luag haujlwm ntawm troponin hauv cov leeg nqaij sib tw quizlet yog dab tsi?
- Troponin swb yav dhau los myosin ua nqaij luv. - Troponin tsim cov ntoo khaub lig hla ntawm actin thiab myosin. - Troponin txav tropomyosin los ntawm actin kom actin tuaj yeem khi rau myosin.
Pom zoo:
Dab tsi yog qhov teeb meem ntawm daim tawv nqaij uas tshwm sim los ntawm kev mob ntev ntawm cov qog sebaceous tshwm sim los ntawm cov khoom zais cia?
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