2. Skeletal Muscle Physiology_2 for class

2. Skeletal Muscle Physiology_2 for class - Muscular...

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Muscular Control 1 An Actin Filament A B Sliding Filament Theory http://jas.fass.org/content/86/4/795/F2.expansion.html Characteristics of Muscle Fiber Types Fibers per Motor Neuron Motor Neuron Size Nerve Conduction Velocity Contraction Time (ms) Type of Myosin ATPase ST FTa FTb 10-180 300-800 300-800 Small Large Large Slow Fast Fast 110 ms 50 ms 50 ms Slow Fast Fast Characteristics of Muscle Fiber Types Sarcoplasmic Reticulum Development Motor Unit Force Aerobic (Oxidative) Capacity Anaerobic (Glycolytic) Capacity ST FTa FTb Low High High Low High High High Moderate Low Low High High
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Muscular Control 2 Principle of orderly recruitment Difference in force of FT and ST motor units due to number of _______per ______, not ______________ Strength of Fibers Components of Muscular Fitness rhombus6 Strength – maximal force muscle or muscle group generates rhombus6 Power – strength x speed of movement rhombus6 Muscular endurance – capacity to sustain repeated muscle action How do you get stronger?
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