Physiology Nervous system b599db57 Muscle contraction following nerve impulse involves following steps expect A Action potential across nerve muscle junction (NMJ) B Dopamine release at NMJ C Release of calcium form sarcoplasmic reticulum D Calcium initiates attractive forces between actin and myosin filament High-Yield Explanation Acetylcholine is the neurotransmitter in the NMJ Ref: Ganong's Review of Medical Physiology 26th edition