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Actin and myosin cross-bridge cycling causes muscle contraction. Contraction may occur voluntarily of involuntarily. Voluntary contraction is controlled by the impulses generated in the brain and involuntary reflexes are initiated by the spinal cord. Edited by Ashraf

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Channels: Scientific Animations Cell Biology

Tags: contraction

Upload by: mnazirokur on 30-03-2008.

Duration: 0m 42s

Dnatube: Sciencific and Medical video site.