title: Peptidergic versus purinergic nerves.
mesh_terms: D001341:Autonomic Nervous System / Q000166:cytology / Q000502:physiology*; D005768:Gastrointestinal Hormones / Q000378:metabolism*; D006801:Humans; D009474:Neurons / Q000378:metabolism*; D014660:Vasoactive Intestinal Peptide / Q000378:metabolism*
chemical_list: D005768:Gastrointestinal Hormones; D014660:Vasoactive Intestinal Peptide