![Acetylcholinesterase ua lub luag haujlwm dab tsi hauv cov leeg nqaij? Acetylcholinesterase ua lub luag haujlwm dab tsi hauv cov leeg nqaij?](https://i.answers-medical.com/preview/medical-health/14035327-what-role-does-acetylcholinesterase-play-in-muscle-contraction-j.webp)
Video: Acetylcholinesterase ua lub luag haujlwm dab tsi hauv cov leeg nqaij?
![Video: Acetylcholinesterase ua lub luag haujlwm dab tsi hauv cov leeg nqaij? Video: Acetylcholinesterase ua lub luag haujlwm dab tsi hauv cov leeg nqaij?](https://i.ytimg.com/vi/8Wluv1kKGUM/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Thaum lub cev muaj zog paj hlwb tau txais cov teeb liab tsim nyog los ntawm lub paj hlwb, nws tso tawm acetylcholine tshuaj nyob rau hauv nws synapses nrog cov leeg hlwb. Nyob ntawd, acetylcholine tshuaj qhib receptors ntawm lub cov leeg cell, ua rau cov txheej txheem ntawm kev cog lus . Kev ntxuav ntawm qub acetylcholine tshuaj yog txoj haujlwm acetylcholinesterase tshuaj.
Raws li, puas muaj acetylcholinesterase cuam tshuam rau cov leeg sib zog?
nqaij contractions tawg los ntawm enzyme acetylcholinesterase tshuaj , uas yog anchored nyob rau hauv qab daus daim nyias nyias, los yog diffuses tawm ntawm thawj cleft, yog li tiv thaiv tas li stimulation ntawm acetylcholine tshuaj cov receptors.
Lub luag haujlwm ntawm AChE hauv NMJ yog dab tsi? Acetylcholinesterase ( AChE ) yog ib qho tseem ceeb ua haujlwm ntawm cov protein neuromuscular hlws ris ( NMJ ). Nws yog lub luag haujlwm rau nrawm hydrolysis ntawm acetylcholine tom qab nws khi rau cov postsynaptic receptors [1], [2]. Yuav kom ua tau zoo, AChE yog qhov ua tau zoo nyob hauv kev sib tshuam hauv paus lamina.
Yooj yim li ntawd, txoj haujlwm ntawm acetylcholinesterase yog dab tsi?
Nws yog ib qho enzyme uas txhawb kev tawg ntawm acetylcholine tshuaj thiab ntawm qee qhov lwm cov choline esters uas muaj nuj nqi raws li neurotransmitters. AChE muaj nyob rau ntawm cov neuromuscular junctions thiab hauv cov tshuaj synapses ntawm hom cholinergic, qhov twg nws cov haujlwm ua haujlwm los txiav tawm cov kab mob sib kis.
acetylcholine ua rau cov leeg nqaij contraction li cas?
Cov acetylcholine tshuaj cov molecules ces khi rau nicotinic ion-channel receptors ntawm lub cov leeg cell membrane, ua rau cov ion channel qhib. Sodium ions ces ntws mus rau hauv cov leeg cell, pib ib theem zuj zus ntawm cov kauj ruam uas thaum kawg tsim nqaij contraction.
Pom zoo:
Dab tsi yog lub luag haujlwm ntawm ca2+ hauv cov leeg nqaij?
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Cov leeg sib zog: Calcium tseem nyob hauv sarcoplasmic reticulum kom txog thaum tso tawm los ntawm kev txhawb nqa. Calcium khi rau troponin, ua rau troponin hloov pauv thiab tshem tropomyosin los ntawm qhov chaw khi. Kev hla tus choj txuas ntxiv mus txog thaum cov calcium ions thiab ATP tsis muaj lawm
Lub luag haujlwm thiab lub luag haujlwm ntawm cov koom nrog hauv kev faib tshuaj yog dab tsi?
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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