欢迎来到天天文库
浏览记录
ID:70406647
大小:6.01 MB
页数:40页
时间:2021-11-22
《骨骼肌肉》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、SkeletalMuscleStructureandFunctionChapter19MuscletypesSkeletalmuscleStriatedVoluntary400skeletalmuscles40-50%oftotalbodyweightFunctionsLocomotionandbreathingPosturalsupportHeatproductionduringcoldstressSmoothmuscleNon-striatedTonalcontrolCardiacmuscle
2、Electricallycoupledcells2006StructureofSkeletalMuscle:ConnectiveTissueCoveringEpimysiumSurroundsentiremusclePerimysiumSurroundsbundlesofmusclefibers(Fascicles)EndomysiumSurroundsindividualmusclefibers2006StructureofSkeletalMuscle:MicrostructureSarcole
3、mmaMusclecellmembraneMyofibrilsThreadlikestrandswithinmusclefibersActin(thinfilament)TroponinTropomyosinMyosin(thickfilament)2006StructureofSkeletalMuscle:MicrostructureAbandAnisotropic(dark)IbandIsotropic(light)ZdiscZwischenscheibe(betweenzone)HzoneH
4、ellerscheibe(cleardisc)2006StructureofSkeletalMuscle:TheSarcomereAI2006StructureofSkeletalMuscle:TheSarcomere2006Z-disc-actininThickFilamentsMyosinFigure19.7StructureofSkeletalMuscle:TheSarcomereThinFilamentsActinTroponin(CTI)Tropomyosin2006Structure
5、ofSkeletalMuscle:TheSarcomereNebulindefineslengthofthinfilamentTropomodulincapsthinfilamentTitincentersthickfilament2006TheNeuromuscularJunctionSynapsebetweenmotorneuronandmusclefiberneuromuscularcleftMotorendplatePocketformedaroundmotorneuronbysarcol
6、emmaAcetylcholineCausesend-platepotential(EPP)Depolarizesmusclefiber20062006StructureofSkeletalMuscle:TheSarcoplasmicreticulumSarcoplasmicreticulumStoragesitesforcalciumTransversetubules2006Severaltypesofionchannel200620062006Figure19.9Cross-BridgeFor
7、mationinMuscleContraction2006Summary2006SarcomerelengthLengthofthickfilament1.6mLengthofthinfilament1.0m2006MuscularContractionTheslidingfilamentmodelMovementoftheactinfilamentoverthemyosinfilamentFormationofcross-bridgesbetweenactinandmyosinfilamen
8、tsReductioninthedistancebetweenZ-discsofthesarcomereActinMyosinActinin(z-disc)20062006EnergyforMuscleContractionATPisrequiredformusclecontractionMyosinATPasebreaksdownATPasfibercontractsSourcesofATPPhosphocreatine(PC)GlycolysisOxidativephosphoryl
此文档下载收益归作者所有