Biology / Bio 3131 · Procedure · 60–90 seconds
Tracing a Single Muscle Contraction Cycle, Worked
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This procedure traces one muscle contraction cycle end to end, from nerve signal through filament sliding to relaxation, drawing together this chapter's neuromuscular and sarcomere atoms.
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Treating contraction as a single event rather than a repeating cycle is the error here — each power stroke pulls the filament only a short distance, and sustained shortening requires the whole bind-pull-release sequence to repeat many times over.
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