Muscarinic AntagonistsReceptors, MuscarinicScopolamine HydrobromideAtropineParasympatholyticsPirenzepineReceptor, Muscarinic M3Muscarinic AgonistsReceptor, Muscarinic M1Heart RateReceptor, Muscarinic M4CarbacholN-MethylscopolamineParasympathomimeticsMuscarineCholinergic AgonistsAcetylcholineDiaminesGallamine TriethiodideScopolamine DerivativesBethanecholCholinergic AgentsPropylbenzilylcholine MustardPiperidinesPilocarpineGuinea PigsBenzilatesMuscle, SmoothArecolineDose-Response Relationship, DrugQuinuclidinesParasympathetic Nervous SystemMethacholine CompoundsDicyclomineReceptors, CholinergicRats, Sprague-DawleyBethanechol CompoundsRadioligand AssayNeuromuscular BlockadeMuscle ContractionCalciumThiadiazolesIleumGTP-Binding ProteinsCholinergic AntagonistsElectric StimulationPhysostigmineAtropine DerivativesDexetimideCHO CellsCholinesterase InhibitorsPhosphatidylinositolsRats, WistarUrinary BladderHexamethonium CompoundsSignal TransductionMethacholine ChlorideNeuronsMembrane PotentialsMyocardiumCricetinaeCholinergic FibersInositol PhosphatesNicotinic AntagonistsVagus NervePropranololTracheaTropicamidePatch-Clamp TechniquesGlycopyrrolateCells, CulturedAlcuronium