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THE MUSCULAR THE MUSCULAR SYSTEMSYSTEM
CHAPTER 10CHAPTER 10
Interactions of Interactions of Skeletal MuscleSkeletal Muscle
Agonist=prime moverAgonist=prime mover
Antagonist=opposes the agonistAntagonist=opposes the agonist
Synergist=helpersSynergist=helpers
Fixators=immobilizersFixators=immobilizers
Naming Skeletal MusclesNaming Skeletal Muscles
LocationLocation ShapeShape Relative sizeRelative size DirectionDirection Number of originsNumber of origins Location of attachmentsLocation of attachments ActionAction
Fascicle ArrangementFascicle Arrangement
Muscle MechanicsMuscle Mechanics
Lever SystemsLever Systems
What is a Lever?What is a Lever?
A A leverlever is a rigid bar that moves on a is a rigid bar that moves on a fixed point, or fixed point, or fulcrumfulcrum, when a force , when a force is applied to it. The applied force, or is applied to it. The applied force, or efforteffort, is used to move a resistance, , is used to move a resistance, or or loadload. .
Mechanical AdvantageMechanical Advantage
Mechanical DisadvantageMechanical Disadvantage
Three Classes of LeversThree Classes of Levers
Three Classes of LeversThree Classes of Levers
Three Classes of LeversThree Classes of Levers
Human Muscular SystemHuman Muscular System
Homeostatic ImbalancesHomeostatic Imbalances
Myasthenia gravisMyasthenia gravis Rigor mortisRigor mortis AtrophyAtrophy Duchenne muscular dystrophyDuchenne muscular dystrophy HerniaHernia MyalgiaMyalgia FibromyositisFibromyositis StrainStrain
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