title: Hormones, autacoids, neurotransmitters, and growth factors.
mesh_terms: D012898:Autacoids / Q000502:physiology*; D006133:Growth Substances / Q000502:physiology*; D006728:Hormones / Q000502:physiology*; D018377:Neurotransmitter Agents / Q000502:physiology*
chemical_list: D012898:Autacoids; D006133:Growth Substances; D006728:Hormones; D018377:Neurotransmitter Agents