AcetylcholineReceptors, NicotinicReceptors, Cholinergicalpha7 Nicotinic Acetylcholine ReceptorNicotinic AntagonistsBungarotoxinsTorpedoMuscarinic AntagonistsReceptors, MuscarinicVesicular Acetylcholine Transport ProteinsDose-Response Relationship, DrugNicotinic AgonistsAtropineHormone AntagonistsNicotineExcitatory Amino Acid AntagonistsDopamine AntagonistsCarbacholRats, Sprague-DawleyElectric OrganPiperidinesNeurokinin-1 Receptor AntagonistsTubocurarinePhysostigmineNeuromuscular JunctionNarcotic AntagonistsCholinergic AgentsHistamine H2 AntagonistsGuinea PigsInterleukin 1 Receptor Antagonist ProteinGABA AntagonistsMuscarinic AgonistsReceptor, Muscarinic M2VasodilationReceptor, Muscarinic M1MecamylamineParasympathomimeticsCholinesterase InhibitorsRats, WistarVasodilator AgentsCholineReceptor, Muscarinic M3Electric StimulationHistamine H1 AntagonistsHistamine AntagonistsMuscle ContractionPurinergic P1 Receptor AntagonistsAcetylcholinesteraseParasympatholyticsAconitineCholinergic AntagonistsNeuronsCalciumMyasthenia GravisAdrenergic alpha-1 Receptor AntagonistsAdenosine A2 Receptor AntagonistsMusclesPyridinesBinding, CompetitiveMuscle, SmoothPurinergic P2 Receptor AntagonistsConotoxinsMembrane PotentialsSynaptic TransmissionCholinergic AgonistsNorepinephrineRadioligand AssayMotor EndplateCholine O-AcetyltransferaseSerotonin 5-HT3 Receptor AntagonistsBicyclo Compounds, HeterocyclicEndothelium, VascularNitroprussideOxotremorineAzocinesPirenzepineCells, CulturedScopolamine HydrobromideQuinuclidinyl BenzilateDihydro-beta-ErythroidineParasympathetic Nervous SystemAdenosine A1 Receptor AntagonistsSerotonin 5-HT2 Receptor AntagonistsSerotoninN-MethylscopolamineElectrophysiologyTime FactorsDrug InteractionsHexamethonium CompoundsCholinergic FibersNitric OxideAdrenergic AntagonistsQuinolizinesLeukotriene AntagonistsAngiotensin Receptor AntagonistsAdrenergic alpha-AntagonistsGallamine TriethiodideIleumCobra Neurotoxin ProteinsCalcium Channel Blockers