The myosin heads form a cross bridge with the neighboring actin filaments.The energy for the cross-bridge cycle and muscle contraction is provided by

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Quizplus · Accepted Answer

The energy for the cross-bridge cycle and muscle contraction is provided by ATP, which is hydrolyzed by the myosin heads to provide energy for the movement of the myosin heads along the actin filaments. Pyruvate, lactic acid, NADH, and glucose are all involved in cellular respiration and energy production, but they do not directly provide energy for muscle contraction.

The Myosin Heads Form a Cross Bridge with the Neighboring