Pre-lab Quiz 2 A single action potential propagating down a motor axon results in several action potentials and several contractile events in the muscle fibers it innervates. several action potentials and a single contractile event in the muscle fibers it innervates. a single action potential and several contractile events in the muscle fibers it innervates. O a single action potential and a single contractile event in the muscle fibers it innervates. Check Answer Prev 2 of 4 Next P Pearson ALWAYS LEARNING 1 52'F Cloudy Q Search Thi ZA