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Catecholamines adrenal medulla5/17/2023 The adrenal medulla therefore affects energy availability, heart rate, and basal metabolic rate. The adrenal medulla cells grouped around blood vessels are intimately connected with the sympathetic division of the autonomic nervous system (ANS).Īdrenal medullary cells are modified postganglionic neurons, and preganglionic autonomic nerve fibers lead to them directly from the central nervous system. The catecholamines include: epinephrine, norepinephrine, and a small amount of dopamine, in response to stimulation by sympathetic preganglionic neurons. It is the innermost part of the adrenal gland, consisting of chromaffin cells that secrete catecholamines. The adrenal medulla is located at the center of the adrenal gland, being surrounded by the adrenal cortex.
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