Receptor, Muscarinic M3Receptor, Muscarinic M1Receptors, MuscarinicReceptor, Muscarinic M2Muscarinic AntagonistsMuscarinic AgonistsReceptor, Muscarinic M4N-MethylscopolamineReceptor, Muscarinic M5CarbacholDiaminesParasympatholyticsGallamine TriethiodidePirenzepineCholinergic AgonistsAtropineDiphenylacetic AcidsAcetylcholineCholinergic AgentsMuscarineThiadiazolesPiperidinesParasympathomimeticsScopolamine HydrobromideDioxolanesScopolamine DerivativesRadioligand AssayBethanecholOxotremorineMuscle, SmoothDicyclomineCHO CellsBiperidenDose-Response Relationship, DrugMethacholine ChloridePilocarpineGuinea PigsDopamine AgonistsCricetinaeGTP-Binding ProteinsTracheaMaltaMuscle ContractionIleumDrug AgonismRats, Sprague-DawleyGTP-Binding Protein alpha Subunits, Gq-G11Pertussis ToxinGTP-Binding Protein alpha Subunits, Gi-GoTropicamideBinding, CompetitiveGuanosine 5'-O-(3-Thiotriphosphate)PhosphatidylinositolsCricetulusObidoxime ChlorideType C PhospholipasesCalciumVirulence Factors, BordetellaBenztropineInositol PhosphatesAllosteric RegulationIsatinGABA AgonistsTacrineNicotinic AgonistsRats, WistarCholinergic FibersIsoproterenolPropylbenzilylcholine MustardG Protein-Coupled Inwardly-Rectifying Potassium ChannelsHeart AtriaArecolineCyclic AMPSignal TransductionQuinuclidinesRGS ProteinsPurinergic P1 Receptor AgonistsBenzilatesCells, CulturedElectric StimulationAdrenergic AgonistsPatch-Clamp TechniquesKineticsLigandsPhthalimidesPyridinesAdrenergic beta-AgonistsQuinuclidinyl BenzilatePhospholipase C betaTransfectionTritiumReceptors, CholinergicMethacholine CompoundsAllosteric SiteAdenylate CyclaseMuscle RelaxationMembrane PotentialsDrug InteractionsNeuronsParasympathetic Nervous System