title: Tetrodotoxin-resistant divalent action potentials in an axon of Aplysia.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001048:Aplysia / Q000502:physiology*; D001369:Axons / Q000187:drug effects / Q000502:physiology*; D001464:Barium / Q000494:pharmacology; D002118:Calcium / Q000494:pharmacology; D066298:In Vitro Techniques; D009431:Neural Conduction / Q000187:drug effects; D012964:Sodium / Q000378:metabolism; D013757:Tetraethylammonium Compounds / Q000494:pharmacology; D013779:Tetrodotoxin / Q000494:pharmacology*
chemical_list: D013757:Tetraethylammonium Compounds; D001464:Barium; D013779:Tetrodotoxin; D012964:Sodium; D002118:Calcium