Question

Please match force production capacity to velocity for concentrically activated muscle

-High velocity=
-Medium velocity=
-Low velocity=

Answer 1

Muscle fibers can produce high force at low velocity due to more time for cross-bridge cycling and efficient ATP hydrolysis. At high velocity, the contraction speed is too fast for these processes, resulting in low force production. Medium velocity would result in a moderate level of force production.

Step-by-step explanation:

The question relates to the force production capacity of muscle fibers at different velocities of concentric contraction. The force a muscle can produce is dependent on several factors, including the velocity at which the muscle is contracting, the myosin ATPase activity, and whether the muscle is primarily oxidative or glycolytic.

At low velocity, muscle fibers are capable of producing a high force as there is ample time for cross-bridge formation and myosin's ATPase has enough time to hydrolyze ATP efficiently. Conversely, at high velocity, the force production capacity is low, because the rapid contraction provides less time for cross-bridge cycling and efficient ATP hydrolysis. Therefore, muscles contract with diminishing force as the speed of contraction increases. At medium velocity, the force production would be moderate, falling between the high force at low velocity and the low force at high velocity.