The term chromaffin cells is derived from the properties of the parenchymal cells of the adrenal medulla whereby they are stained from yellow to brown after treatment with chromate- or dichromate-containing fixatives (Bennett 1941; Wood 1963; Coupland 1965a). It was Kohn (1903) who named this phenomenon the chromaffin reaction. The chromaffin reaction was regarded as a specific histochemical test for adrenaline and related substances. Thus, adrenal chromaffin cells have been regarded as occupying a special position among endocrine cells as the only adrenaline-secreting cells.
KeywordsSecretory Granule Chromaffin Cell Adrenal Medulla Opioid Peptide Sympathetic Ganglion
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