MUSCLES AND MUSCLE TISSUES Chapter 9. Functions of Muscle Tissue Movement Heat production Maintenance of posture Stabilize joints.

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Presentation transcript:

MUSCLES AND MUSCLE TISSUES Chapter 9

Functions of Muscle Tissue Movement Heat production Maintenance of posture Stabilize joints

Functional Characteristics Excitability Contractibility Extensibility Elasticity

Types of Muscle Tissue Skeletal Smooth Cardiac

Gross Anatomy of Skeletal Muscle Highly vascularized Highly innervated

Gross Anatomy of Skeletal Muscle

Muscle Attachments Insertion versus origin Direct attachment (fused to periosteum) Indirect attachment (tendons, aponeurosis)

Microscopic Anatomy

Neuromuscular Junction

Generating an Action Potential

Sliding Filament Model

Animation

Motor Units

Typical Myogram

Frequency of Stimulation Treppe

Muscle Tone

Muscle Metabolism

Muscle Fatigue

Cardiac Muscle

Smooth Muscle

Types of Muscle Tissue

Muscular Disorders Myasthenia gravis Shortage of ACh receptors Muscular Dystrophy Fragile, abnormal sarcolemma Too much calcium, damages fibers Loss of regeneration, muscles waste Tetanus Clostridium tetani, no release of ACh

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