Some primitive autonomic ganglia transform into neurons, some into satellite and neurolemma cells associated with neurons, and others become distinct endocrine elements. The latter stain brown with chrome salts and are thus designated chromaffin cells. This reaction is the result of the presence of the hormone, epinephrine, contained within the cells. The chromaffin system consists of various aggregates of these cells throughout the body. The adrenal medulla is the most prominent member of the group.
KeywordsTyrosine Hydroxylase Vasoactive Intestinal Peptide Chromaffin Cell Adrenal Medulla Catecholamine Secretion
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