title: Optic nerve transmitters in lower vertebrate species.
mesh_terms: D000818:Animals; D002024:Bufo marinus; D055598:Chemical Phenomena; D002621:Chemistry; D005399:Fishes; D006651:Histocytochemistry; D009474:Neurons / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000502:physiology*; D009900:Optic Nerve / Q000502:physiology*; D012160:Retina / Q000502:physiology; D014714:Vertebrates / Q000502:physiology*
chemical_list: D018377:Neurotransmitter Agents