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Crash Course A&P: Muscles, Part 2

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Table of Contents: Skeletal Muscles Work Together to Create and Reverse Movements 1:14 Motor Units 3:52 Three Phases of Muscle Twitches 4:41 Strength and Frequency of Impulses 5:29 Strength and Duration of a Contraction 5:29 Twitch Summation vs Tetanus 6:19 Isotonic vs Isometric Movements 8:50

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