Physiology Noradrenaline is major neurotransmitter in – A Postganglionic parasympathetic fibres B Postganglionic sympathetic fibres except in sweat glands C Autonomic ganglia D Preganglionic autonomic fibres 💡 Explanation Noradrenaline is major neurotransmitter in - ✓ Correct Answer: B. Postganglionic sympathetic fibres except in sweat glands