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What shortens during muscle contraction?

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During contraction, the thin filaments slide past the thick filaments, shortening the sarcomere. This content is not compatible on this device. The thick and thin filaments do the actual work of a muscle, and the way they do this is pretty cool. read more

During muscle contraction, ATP is required for the transport of calcium ions into the sarcoplasmic reticulum, but also for the release of cross-bridges, the formation of cross-bridges, and the active transport of Na+ and K+ ions. read more

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Lecture 9a Muscle structure. - ppt video online download
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