MS-2306

A 28-year-old patient arrives at the Emergency Department complaining of severe headache and abdominal pain that started 2 hours ago. Upon assessment, the patient’s blood pressure is measured at 210/115 mmHg and heart rate at 140 beats per minute.

Further tests reveal elevated levels of urinary metanephrines and serum noradrenaline. A CT scan of the abdomen confirms the presence of a pheochromocytoma in the right adrenal gland.

In which part of the nervous system is this neurotransmitter secreted?