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Final answer:The power stroke in muscle contraction refers to the sliding of actin relative to myosin filaments.Explanation:The power stroke corresponds to thesliding of actin relative to myosin filamentsin muscle contraction. During the power stroke, the myosin head attaches to the actin, causing the actin filaments to move towards the center of the sarcomere. This movement is responsible for muscle contraction and force generation.Learn more about Muscle Contraction here:brainly.com/question/33888889#SPJ11...