title: The evolutionary origins of hormones, neurotransmitters, and other extracellular chemical messengers: implications for mammalian biology.
mesh_terms: D000818:Animals; D018407:Bacterial Physiological Phenomena; D005075:Biological Evolution; D002648:Child; D004702:Endocrine Glands / Q000502:physiology; D005088:Exocrine Glands / Q000502:physiology; D005110:Extracellular Space / Q000378:metabolism; D006168:Guinea Pigs; D006728:Hormones / Q000096:biosynthesis / Q000378:metabolism / Q000502:physiology*; D006729:Hormones, Ectopic / Q000378:metabolism; D006801:Humans; D007448:Invertebrates / Q000502:physiology; D046911:Macromolecular Substances; D008322:Mammals / Q000502:physiology*; D009369:Neoplasms / Q000378:metabolism; D009424:Nervous System Physiological Phenomena; D018377:Neurotransmitter Agents / Q000096:biosynthesis / Q000378:metabolism / Q000502:physiology*; D010455:Peptides / Q000502:physiology; D010675:Pheromones / Q000502:physiology; D010802:Phylogeny; D014714:Vertebrates / Q000502:physiology
chemical_list: D006728:Hormones; D006729:Hormones, Ectopic; D046911:Macromolecular Substances; D018377:Neurotransmitter Agents; D010455:Peptides; D010675:Pheromones