Interactions between actin and myosin filaments of the sarcomere are liable to muscle contraction.
Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other.
It is commonly believed that this process is driven by cross-bridges that extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed.
Thus, muscle contraction is the correct answer.
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