Ions, drugs and the axon membrane.
D000200:Action Potentials; D000818:Animals; D001001:Anura; D001369:Axons / Q000187:drug effects*; D002118:Calcium / Q000494:pharmacology*; D002462:Cell Membrane / Q000187:drug effects*; D003445:Crustacea; D004594:Electrophysiology; D008564:Membrane Potentials; D011343:Procaine / Q000494:pharmacology*; D012964:Sodium / Q000378:metabolism*; D013779:Tetrodotoxin / Q000494:pharmacology; D014118:Toxins, Biological / Q000494:pharmacology*
D014118:Toxins, Biological; D013779:Tetrodotoxin; D011343:Procaine; D012964:Sodium; D002118:Calcium