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Sliding Filament Theory

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Sliding Filament Theory  The process starts with the sarcoplasmic reticulum is stimulated to release calcium ions into the muscle. Then the calcium ions bind to the troponin-tropomyosin and drags off the cross bridges of the myosin Cross bridges bind to actin with ATP Cross bridges pull on actin so it slides to the middle of the sarcomere which contracts the muscle Cross bridges detract from the actin and ATP changes into ADP+P Muscle fiber relaxes Calcium close and transport pump carries calcium through transport pump into the sarcoplasmic reticulum  https://www.ptdirect.com/training-design/anatomy-and-physiology/skeletal-muscle-the-physiology-of-contraction
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Function

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