Muscles
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Actin myosin crossbridge animation
A 3D animation showing the role of ATP in the crossbridge cycle.
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Action potentials and muscle contraction
Animation and quiz.
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Animation – sliding filament hypothesis
Animation showing muscle contraction and sliding filament theory from Big Picture site.
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How muscles work
Article from How Stuff Works including diagrams of sarcomere structure
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Muscle video clip
Youtube clip set to music.
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The sliding filament hypothesis of muscle contraction
Page of explanation and diagrams on sliding filament hypothesis from the A level Biologist site.