Tetrodotoxin's highly selective blockage of an ionic channel.
D000200:Action Potentials / Q000187:drug effects*; D000779:Anesthetics, Local / Q000494:pharmacology; D000818:Animals; D001369:Axons / Q000187:drug effects; D006321:Heart / Q000187:drug effects; D007477:Ions / Q000502:physiology*; D008564:Membrane Potentials / Q000187:drug effects*; D008974:Mollusca; D009130:Muscle, Smooth / Q000187:drug effects; D009469:Neuromuscular Junction / Q000187:drug effects / Q000502:physiology; D011955:Receptors, Drug / Q000502:physiology; D011984:Sensory Receptor Cells / Q000187:drug effects; D013569:Synapses / Q000187:drug effects / Q000502:physiology; D009435:Synaptic Transmission / Q000502:physiology*; D013779:Tetrodotoxin / Q000494:pharmacology*
D000779:Anesthetics, Local; D007477:Ions; D011955:Receptors, Drug; D013779:Tetrodotoxin