Labels:text | screenshot | black | black and white | font OCR: A number of peptides are classed as tract (Fig. neurotransmitters in the gastrointestin ves and 19.4). These are released from enteric n have a local role; they include alanin, calcitonin-gene-related peptide (CGRP), , and do bombesin, and gastrin-releasing peptide n the not have a clear physiological function e a specific gastrointestinal tract, nor do they produ in excess. gastrointestinal syndrome when secrete