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. 2019 Feb 20;13:21. doi: 10.3389/fnins.2019.00021

Figure 3.

Figure 3

Effects of neurotransmitters on insulin secretion. Neurotransmitters modulate the insulin secretion by activating different receptors both directly at the islets and indirectly at the ganglionic level. ACh, acetylcholine; GRP, gastrin-releasing peptide; VIP, vasoactive intestinal peptide; NO, nitric oxide; NE, noradrenaline; NPY, neuropeptide Y; PACAP, pituitary adenylate cyclase activating polypeptide; 5-HT, serotonin; CCK, cholecystokinin; CGRP, calcitonin gene-related peptide; SP, substance P.