The sequence of events in stimulus-secretion coupling in neurons can be divided into three main steps—reception of stimuli, conduction of excitation, and extrusion of messenger substances. These three main steps occur in neurons and neurosecretory cells in three functionally different membrane structures: The receptive or input portion is generally the dendritic zone and the soma (perikaryon), and the terminal or output portion may have terminal branches or an unbranched process; the conductile portion between the input and output sites is generally long (Fig. 4.1)
KeywordsSecretory Granule Chromaffin Cell Adrenal Medulla Secretory Product Gustatory Cell
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