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MUSCLES AND MUSCLE TISSUES Chapter 9
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Functions of Muscle Tissue Movement Heat production Maintenance of posture Stabilize joints
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Functional Characteristics Excitability Contractibility Extensibility Elasticity
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Types of Muscle Tissue
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Gross Anatomy of Skeletal Muscle
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Highly vascularized Highly innervated
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Muscle Attachments Insertion versus origin Direct attachment Indirect attachment (tendons and aponeurosis)
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Microscopic Anatomy
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Neuromuscular Junction
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Generating an Action Potential
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Sliding Filament Model
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Motor Units
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Typical Myogram
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Frequency of Stimulation Treppe
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Muscle Tone
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Muscle Metabolism
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Muscle Fatigue
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THE MUSCULAR SYSTEM CHAPTER 10
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Interactions of Skeletal Muscle Agonist=prime mover Agonist=prime mover Antagonist=opposes the agonist Antagonist=opposes the agonist Synergist=helpers Synergist=helpers Fixators=immobilizers Fixators=immobilizers
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Naming Skeletal Muscles Location Location Shape Shape Relative size Relative size Direction Direction Number of origins Number of origins Location of attachments Location of attachments Action Action
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Fascicle Arrangement
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Muscle Mechanics Lever Systems
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What is a Lever? A lever is a rigid bar that moves on a fixed point, or fulcrum, when a force is applied to it. The applied force, or effort, is used to move a resistance, or load.
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Mechanical Advantage
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Mechanical Disadvantage
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Three Classes of Levers
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