Learning Objectives Explain the process involved with initiating muscle contraction and relaxation By the end of this section, you will be able to: Describe the connection between motor neurons and muscles Explain the mechanism of neurotransmitter signaling generating a post synaptic electrical signal Explain the process of excitation-contraction coupling Explain how muscle contraction and relaxation is … Continue reading 10.3 Muscle Fiber Excitation, Contraction, and Relaxation