title: Frequency dependent decrease of quantal content in a drug-treated neuromuscular junction.
mesh_terms: D000818:Animals; D001001:Anura; D001713:Biphenyl Compounds / Q000494:pharmacology*; D002118:Calcium; D004558:Electric Stimulation; D005071:Evoked Potentials / Q000187:drug effects; D006426:Hemicholinium 3 / Q000494:pharmacology; D006614:Hindlimb; D008274:Magnesium; D008564:Membrane Potentials / Q000187:drug effects; D008566:Membranes / Q000187:drug effects; D009132:Muscles / Q000187:drug effects; D009469:Neuromuscular Junction / Q000187:drug effects*; D009538:Nicotine / Q000037:antagonists & inhibitors; D010276:Parasympatholytics / Q000494:pharmacology; D000644:Quaternary Ammonium Compounds / Q000494:pharmacology*; D011894:Rana pipiens; D009435:Synaptic Transmission / Q000187:drug effects*
chemical_list: D001713:Biphenyl Compounds; D010276:Parasympatholytics; D000644:Quaternary Ammonium Compounds; D006426:Hemicholinium 3; D009538:Nicotine; D008274:Magnesium; D002118:Calcium