actomyosin dissociation

What Moves Closer Together During Contraction?

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What Moves Closer Together During Contraction? The mechanism of contraction is the binding of myosin to actin, forming cross-bridges that generate filament movement (Figure 6.7). … The A band does not shorten—it remains the same length—but A bands of different sarcomeres move closer together during contraction, eventually disappearing. Which sarcomere structures move closer together during

What Causes Excitation-contraction Coupling?

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What Causes Excitation-contraction Coupling? Excitation-contraction coupling involves the transformation of depolarizing events in the sarcolemma into the initiation of mechanical shortening of the myofibrils within the myofiber by calcium ions released from the terminal cisternae of the sarcoplasmic reticulum (SR). What is the relationship between the number of motor neurons recruited and the number of