3d image of vasoactive intestinal peptide skeletal formula

vasoactive intestinal peptide polypeptide vip peptide hormone vasoactive glucagon secretin protein–coupled receptors suprachiasmatic nuclei hypothalamus brain vasodilation glycogenolysis blood pressure smooth muscle trachea gallbladder stomach vip gene digestive system lower esophageal sphincter scn circadian rhythm signaling pathway neuroendocrine social behavior amygdala ventral tegmental area neuropeptide hormonal function action endocrine endocrinology level neurotransmitter receptor agonist neuromodulatory nervous endocannabinoid stress signaling neuroscience 3d