AcetylcholineReceptors, MuscarinicNeuromuscular JunctionMotor EndplateReceptor, Muscarinic M1Muscarinic AgonistsMuscarinic AntagonistsN-MethylscopolamineReceptor, Muscarinic M3Receptor, Muscarinic M4Synaptic TransmissionParasympatholyticsGallamine TriethiodideDiphenylacetic AcidsParasympathomimeticsPirenzepineIleumGuinea PigsCarbacholReceptors, CholinergicReceptors, NicotinicReceptor, Muscarinic M2AtropineRadioligand AssayMuscle, Smoothalpha7 Nicotinic Acetylcholine ReceptorMuscarineCholinergic AgonistsBungarotoxinsCholinergic AgentsNicotinic AntagonistsTorpedoVesicular Acetylcholine Transport ProteinsScopolamine HydrobromideDiaminesPhysostigmineNicotinic AgonistsScopolamine DerivativesNicotineCholinesterase InhibitorsBethanecholParasympathetic Nervous SystemTubocurarineDose-Response Relationship, DrugElectric OrganAcetylcholinesterasePropylbenzilylcholine MustardMuscle ContractionPilocarpineMecamylaminePiperidinesCholinergic AntagonistsBenzilatesCholineArecolineMethacholine CompoundsHexamethonium CompoundsQuinuclidinesCholinergic FibersCholine O-AcetyltransferaseElectric StimulationCalciumMembrane PotentialsVasodilationVasodilator AgentsAconitineNeuronsBethanechol CompoundsRats, Sprague-DawleyNeostigmineMyasthenia GravisDicyclomineNitroprussideMusclesGTP-Binding ProteinsTracheaDimethylphenylpiperazinium IodideThiadiazolesElectrophysiologyBinding, CompetitiveHexamethoniumPatch-Clamp TechniquesKineticsCHO CellsAzocinesHemicholinium 3ConotoxinsNorepinephrineDexetimideRats, WistarEndothelium, VascularDihydro-beta-ErythroidineUrinary BladderBicyclo Compounds, HeterocyclicVagus NervePhosphatidylinositolsOxotremorineIontophoresisCobra Neurotoxin ProteinsPotassium