Pharmacology The major neurotransmitter released at end organ effectors of the sympathetic division of the autonomic nervous system is: A Adrenaline B Nor–adrenaline C Dopamine D Acetylcholine 💡 Explanation The major neurotransmitter released at end organ effectors of the sympathetic division of the autonomic nervous system is: ✓ Correct Answer: B. Nor–adrenaline