![Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij? Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij?](https://i.answers-medical.com/preview/medical-health/13852937-what-is-the-role-of-ca2-in-muscle-contraction-j.webp)
Video: Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij?
![Video: Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij? Video: Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij?](https://i.ytimg.com/vi/_9-40PVJzO0/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nqaij leeg : Calcium tseem nyob hauv sarcoplasmic reticulum kom txog thaum tso tawm los ntawm kev txhawb nqa. Calcium tom qab ntawd khi rau troponin, ua rau troponin hloov pauv thiab tshem tropomyosin los ntawm qhov chaw khi. Hla tus choj txuas ntxiv mus txog thaum calcium ions thiab ATP tsis muaj lawm.
Ua qhov no hauv kev txiav txim siab, dab tsi yog lub luag haujlwm ntawm calcium hauv cov leeg nqaij sib tw quizlet?
Ca ions thiab cov protein sib koom ua ke ua lub luag haujlwm tseem ceeb lub luag hauj lwm hauv ob qho tib si nqaij ntawm tes kev cog lus thiab so. Nws khi rau troponin nyuaj, ua rau tropomyosin khi ua ke nrog cov actin strands kom hloov txoj haujlwm thiab nthuav tawm myosin qhov chaw khi rau ntawm cov kab nyias nyias.
Ib yam nkaus, dab tsi yog lub luag haujlwm ntawm calcium hauv lub plawv mob ntsws? Calcium prolongs lub sijhawm ntawm nqaij cell depolarization ua ntej repolarization tshwm sim. Kev cog lus nyob rau hauv mob plawv tshwm sim vim yog kev khi ntawm myosin lub taub hau rau adenosine triphosphate (ATP), uas tom qab ntawd rub cov actin filaments mus rau hauv nruab nrab ntawm sarcomere, cov cuab yeej siv zog ntawm kev cog lus.
Tsis tas li kom paub, cov calcium pab tau li cas hauv cov leeg nqaij?
Sab hauv nqaij , calcium tswj kev sib cuam tshuam ntawm actin thiab myosin thaum lub sijhawm kev cog lus (2, 6). Calcium khi rau troponin, ua rau txoj haujlwm hloov pauv hauv tropomyosin, nthuav tawm cov chaw actin uas myosin yuav txuas rau nqaij leeg (5, 6). Ntshav Tes. Tsis muaj calcium ntshav yuav tsis khov.
ATP siv li cas hauv kev so nqaij?
So kom txaus ntawm Skeletal Muscle ATP -Qhov twj tso kua mis yuav txav Ca++ tawm ntawm sarcoplasm rov qab rau hauv SR. Qhov no ua rau "rov ua dua tshiab" ntawm cov chaw ua haujlwm-khi rau ntawm cov ntaub nyias nyias. Tsis muaj lub peev xwm los tsim cov ntoo khaub lig-txuas nruab nrab ntawm cov tuab thiab tuab filaments, cov nqaij fiber poob nws qhov nro thiab so.
Pom zoo:
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Lub luag haujlwm txoj haujlwm: Txheeb xyuas thiab faib tshuaj raws li daim ntawv yuav tshuaj. Xyuas kom tus neeg mob kos npe rau daim ntawv yuav tshuaj thiab sau nqi raws li xav tau. Txhawm rau khaws cov khoom faib tawm thiab tswj cov khoom lag luam kom zoo ntawm ob qho tshuaj thiab ntim khoom
Lub luag haujlwm ntawm ATP hauv cov leeg nqaij yog dab tsi?
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Smooth nqaij contraction yog tshwm sim los ntawm zawv zawg ntawm myosin thiab actin filaments (ib tug zawv zawg filament mechanism) ntawm ib leeg. Lub zog rau qhov no tshwm sim yog muab los ntawm hydrolysis ntawm ATP. Kev cog lus yog pib los ntawm kev tswj hwm calcium-phosphorylation ntawm myosin, ntau dua li calcium-activated troponin system
Lub luag haujlwm ntawm ATP hauv cov leeg nqaij sib tw quizlet yog dab tsi?
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ATP khi rau myosin ua rau nws hloov txoj hauj lwm thiab txuas mus rau actin thiab rub, ua rau cov leeg nqaij sib cog lus. Yog tsis muaj ATP, cov leeg tsis tuaj yeem cog lus raws li ib feem ntawm cov leeg tsis tuaj yeem txuas mus rau lwm qhov
Dab tsi yog lub luag haujlwm ntawm lub hauv nruab nrab lub paj hlwb thiab lub paj hlwb ib leeg?
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Lub paj hlwb sab hauv suav nrog txhua lub paj hlwb hauv lub cev uas nyob sab nraud ntawm tus txha caj qaum thiab lub hlwb. Cov hlab ntsha no nqa cov ntaub ntawv mus rau thiab los ntawm lub hauv nruab nrab lub paj hlwb kom muab txoj haujlwm ntawm lub cev. Sensory hlwb koom nrog hauv kev noj cov ntaub ntawv los ntawm lub periphery mus rau hauv nruab nrab lub paj hlwb
Lub luag haujlwm ntawm tus kws saib xyuas mob plawv tsis ua haujlwm yog dab tsi hauv kev saib xyuas cov neeg mob plawv tsis ua haujlwm?
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Raws li ib feem ntawm pab pawg, tus kws kho mob lub plawv tsis ua haujlwm tau zoo muab rau muab kev pabcuam rau cov neeg mob thoob plaws txoj kev mob plawv tsis ua haujlwm thiab qhov no yuav tsum muaj kev koom tes ze nrog kws saib xyuas mob hauv thaj chaw tshwj xeeb tshwj xeeb xws li chav kho mob xwm txheej ceev thiab kev kho mob dav/ saib xyuas-ntawm-tus-neeg laus