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It is the innermost part of the adrenal gland, consisting of cells that secrete epinephrine (adrenaline), norepinephrine (noradrenaline), and a small amount of dopamine in response to stimulation by sympathetic preganglionic neurons.he adrenal medulla consists of irregularly shaped cells grouped around blood vessels. These cells are intimately connected with the sympathetic division of the autonomic nervous system (ANS).
The medulla, or inner part of the adrenal glands, produces the hormones norepinephrine and epinephrine, which regulate the fight or flight response in the body, the body's reaction to stressful events.umors of the adrenal glands can secrete excess hormones, causing an increase in blood pressure or heart rate and reducing immune function. Disorders that result in decreased adrenal gland function, such as autoimmune diseases or cancer, can lead to low blood sugar and heart failure.