The neurotransmitter at the vagal nerve ending on the G-cell is:: (A) Ach, (B) Neurotensin, (C) Bombesin, (D) Entero-oxyntin
Answer is C. - G-cell in the pylorus secretes gastrin. - G-cell is innervated by vagal fibers; the transmitter of these fibers is bombesin, also known as gastrin-releasing peptide (GRP). - Neurotensin and entero-oxyntin are the peptides that influence the intestinal phase of the gastric acid secretion.