When cross-bridges form and the muscle fibers contract, the actin myofilament slides past the myosin myofilament.Group startsTrue or False
Question
When cross-bridges form and the muscle fibers contract, the actin myofilament slides past the myosin myofilament.
Group starts
True or False
Solution
True.
In muscle contraction, the sliding filament theory explains that when the actin myofilaments slide past the myosin myofilaments, muscle fibers shorten, leading to contraction. This process is facilitated by the formation of cross-bridges between the actin and myosin filaments. When the myosin heads attach to binding sites on the actin, they pull the actin filaments inward, causing the muscle to contract. This process requires ATP and involves a repeating cycle of attachment, pivoting, and detachment of the cross-bridges, ultimately resulting in movement and contraction of the muscle muscle. Therefore, the statement is accurate.
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