Which one of the following events is thought | vedclass

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(B) The contraction of a muscle fibril occurs via the sliding filament theory,where actin filaments slide over myosin filaments.This process is initia

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Splitting of an $ATP$ myosin complex

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(B) The contraction of a muscle fibril occurs via the sliding filament theory,where actin filaments slide over myosin filaments.This process is initiated by the binding of $Ca^{2+}$ ions to troponin,which exposes the active sites on the actin filament.However,the actual mechanical power stroke that drives the sliding process is directly powered by the hydrolysis of $ATP$ bound to the myosin head.The splitting (hydrolysis) of the $ATP$-myosin complex provides the energy required for the myosin head to undergo a conformational change,pulling the actin filament inward.Therefore,the splitting of the $ATP$-myosin complex is the event most closely related to the actual sliding mechanism.

Which one of the following events is thought to be most closely related to the sliding process between the two types of filaments which bring about contraction of the fibril?

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