Cov txheej txheem:
Video: Dab tsi yog cov kauj ruam hauv cov leeg excitation contraction coupling?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Kev zoo siab – kev sib koom tes hauv cev pob txha nqaij cuam tshuam nrog cov txheej txheem ua ntu zus cov kauj ruam . Ua ntej, lub peev xwm synaptic nkoos lub peev xwm ua haujlwm hauv daim nyias nyias. Tom qab ntawd, kev sib kis ntawm cov teeb liab mus rau hauv lub transverse tubule system txhawb nqa calcium tso tawm ntawm sarcoplasmic reticulum.
Hauv qhov no, dab tsi yog cov kauj ruam hauv excitation contraction coupling?
Cov ntsiab lus hauv cov teeb no (6)
- Kev ua haujlwm muaj peev xwm kis tau nrog sarcolemma mus rau T-tubules (hla tubules)
- Calcium tso rau hauv sarcoplasmic reticulum (SR)
- Calcium khi rau actin thiab thaiv kev ua ntawm tropomyosin raug tshem tawm.
- Myosin taub hau txuas mus pib contraction.
Kuj Paub, dab tsi yog txheej txheem ntawm excitation? Cov txheej txheem ntawm excitation Nws yog ib qho ntawm cov ntsiab lus tseem ceeb uas qhov teeb meem absorbs pulses ntawm electromagnetic zog (photons), xws li lub teeb, thiab los ntawm qhov uas nws yog rhuab los yog ionized los ntawm kev cuam tshuam ntawm cov nqi them, xws li electrons thiab alpha hais.
Ib yam li ib tus tuaj yeem nug, qhov kev txiav txim siab qhov sib txuas ua ke koom nrog dab tsi?
Kev zoo siab - kev sib koom tes sib koom tes muaj kev hloov pauv ntawm cov xwm txheej depolarizing hauv sarcolemma mus rau qhov pib ntawm kev kho tshuab luv ntawm myofibrils hauv myofiber los ntawm calcium ions tso tawm los ntawm lub dav hlau cisternae ntawm sarcoplasmic reticulum (SR).
Dab tsi yog qhov kev txiav txim kom raug ntawm cov kauj ruam hauv kev txo cov leeg nqaij?
- Ca2+ tau xa rov qab mus rau hauv lub davhlau ya nyob twg cisternae. C)
- Myosin taub hau khi rau qhov chaw khi ntawm cov actin. D)
- ATP yog hydrolyzed thiab re-energizes lub taub hau myosin. E)
- ATP ua rau lub taub hau myosin raug tso tawm los ntawm kev khi rau lub taub hau myosin.
- Ca2+ raug tso tawm los ntawm lub dav hlau cisternae (kawg ntawm lub cev muaj zog neuron)
Pom zoo:
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