Graphic differentiation between competitive and functional synergism.
D000818:Animals; D001001:Anura; D002794:Choline / Q000494:pharmacology; D004074:Digitoxin / Q000494:pharmacology; D004357:Drug Synergism; D066298:In Vitro Techniques; D008433:Mathematics; D009119:Muscle Contraction / Q000187:drug effects; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology
D000644:Quaternary Ammonium Compounds; D004074:Digitoxin; D002794:Choline