The peak power generated by any skeletal muscle increases with increasing velocities of movement up to a movement speed of 200-300 degrees per second.Which of the following factors can explain this observation?
A)ATPase activity decreases as a function of the speed of muscle shortening.
B)Myosin cross-bridges develop velocity-related fatigue.
C)muscle ATP levels are depleted at shortening velocities above 300 degrees per second.
D)None of the above answers are correct

Question

Quizplus · Accepted Answer

The peak power generated by skeletal muscle increases with increasing velocities of movement up to a certain point due to the rate at which myosin cross-bridges can cycle and produce force. This is not directly due to ATPase activity decreasing, myosin cross-bridges developing velocity-related fatigue, or muscle ATP levels being depleted at high shortening velocities. Instead, it's related to the intrinsic properties of muscle contraction mechanics and the force-velocity relationship.

The Peak Power Generated by Any Skeletal Muscle Increases with Increasing