<prompt> Muscle contraction following nerve impulse involves following steps expectAction potential across nerve muscle junction NMJDopamine release at NMJRelease of calcium form sarcoplasmic reticulumCalcium initiates attractive forces between actin and myosin filament  <response>: Acetylcholine is the neurotransmitter in the NMJ Ref: Ganongs Review of Medical Physiology 26th edition 