Muscular System - The Muscular System System Muscle Tissues...

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The Muscular The Muscular System System
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Muscle Tissues Muscle Tissues Skeletal Skeletal – striated, multinucleate, voluntary, 10-100 μ m Smooth Smooth - found in walls of hollow visceral organs; ex. stomach, bladder, respiratory passages; visceral, nonstriated, involuntary; discuss peristalsis Cardiac Cardiac in heart only, striated, involuntary, intercalcated disks
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Muscle function: produce movement maintain posture stabilize joints generate heat Functional Characteristics: Excitability - respond to a stimulus Contractility - ability to shorten forcibly when adequately stimulated Extensibility - the ability to be stretched Elasticity - the ability of a muscle fiber to resume its resting length after being stretched
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Skeletal Muscle Skeletal Muscle Tissue Tissue
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Smooth Muscle Smooth Muscle Tissue Tissue
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Cardiac Muscle Cardiac Muscle Tissue Tissue
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Gross Anatomy Skeletal Muscle
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bundle of muscle fibers muscle fiber (cell) myofibril sarcomere Muscle Muscle Anatomy Anatomy
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Myofibril
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Sarcomere Sarcomere Z lines
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Sarcomer Sarcomer e e A band
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Sarcomer Sarcomer e e I bands
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Actin and Myosin Filaments myosin actin
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Myosin (Thick) Filament Myosin (Thick) Filament
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Actin (Thin) Filament Actin (Thin) Filament
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Sliding Filament Hypothesis Sliding Filament Hypothesis
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Actin (Thin) Filament Actin (Thin) Filament No Calcium Ion tropomyosin
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Actin (Thin) Filament Actin (Thin) Filament Calcium Ion Present tropomyosin myosin binding sites
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Actin & Myosin Interaction
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Muscular System - The Muscular System System Muscle Tissues...

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