Is the adrenal gland part of the sympathetic nervous system?
The adrenal medulla is the core of the adrenal gland. Secretion of hormones from the medulla is controlled by the sympathetic nervous system. The cells of the medulla are the body's main source of the hormones adrenaline (epinephrine) and noradrenaline (norepinephrine). These hormones are part of the fight-or-flight response that is initiated by the sympathetic nervous system. The hormones boost the supply of oxygen and glucose to the brain and muscles, while suppressing other non-emergency bodily processes such as digestion.