Tension and load are opposing forces. To move an object, tension must be greater than load. B. Isotonic contraction. C. Isometric contraction. D. Lengthening contraction.
Load causes fibers to lengthen, in spite of tension in the muscle.
Provides energy for power stroke . Releases cross-bridges . High capacity for aerobic metabolism. Adapted for anaerobic metabolism. Fast twitch, but high oxidative activity.