chromaffin cell(redirected from Chromaffin granules)
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a cell that stains with chromic salts; found in adrenal medulla and paraganglia of the sympathetic nervous system.
any one of the special cells that compose the paraganglia and are connected to the ganglia of the celiac, renal, suprarenal, aortic, and hypogastric plexuses. The chromaffin cells of the adrenal medulla secrete two catecholamines, epinephrine and norepinephrine, which affect smooth muscle, cardiac muscle, and glands in the same way as sympathetic stimulation, by increasing and prolonging sympathetic effects.
chro·maf·fin cell(krō-maf'in sel)
A cell that stains with chromic salts in medulla of the suprarenal gland and paraganglia of the sympathetic nervous system.
A cell that produces, stores, and secretes catecholamines (dopamine and norepinephrine). Chromaffin cells are found in the medulla of the adrenal glands and in small clusters in the sympathetic ganglia.
See also: cell