Krishna was going to school and on the way he saw a major bus accident. His heart beat increased and hands and feet become cold. Name the part of the nervous system that had a role to play in this reaction.

Krishna’s symptoms were a result of the sympathetic nervous system activation during an emergency. The adrenal medulla cells release adrenaline and noradrenaline, directly affecting the heart’s pacemaker, leading to increased heart rate and associated symptoms—a typical fright reaction triggered by the sympathetic nervous system.