Nicotinic AntagonistsAcetylcholineMecamylamineReceptors, NicotinicNicotinic AgonistsNicotineDihydro-beta-ErythroidineTubocurarineAconitineChlorisondamineHexamethoniumBungarotoxinsParasympathomimeticsReceptors, Cholinergicalpha7 Nicotinic Acetylcholine ReceptorMuscarinic AntagonistsIbogaineAzocinesGanglionic StimulantsConotoxinsReceptors, MuscarinicErabutoxinsPhysostigmineHexamethonium CompoundsCholinergic AntagonistsGanglionic BlockersAtropineScopolamine HydrobromideQuinolizinesBicyclo Compounds, HeterocyclicCholinergic AgonistsDose-Response Relationship, DrugCarbacholRats, Sprague-DawleyTorpedoPyridinesElectric StimulationMembrane PotentialsSynaptic TransmissionNeuronsVesicular Acetylcholine Transport ProteinsSelf AdministrationAction PotentialsHormone AntagonistsExcitatory Amino Acid AntagonistsDopamine AntagonistsElectric OrganPiperidinesNeurokinin-1 Receptor AntagonistsNeuromuscular JunctionNarcotic AntagonistsCholinergic AgentsHistamine H2 AntagonistsGuinea PigsInterleukin 1 Receptor Antagonist ProteinGABA AntagonistsMuscarinic AgonistsReceptor, Muscarinic M2VasodilationReceptor, Muscarinic M1Cholinesterase InhibitorsRats, WistarVasodilator AgentsCholineReceptor, Muscarinic M3Histamine H1 AntagonistsHistamine AntagonistsMuscle ContractionPurinergic P1 Receptor AntagonistsAcetylcholinesteraseParasympatholyticsCalciumMyasthenia GravisAdrenergic alpha-1 Receptor AntagonistsAdenosine A2 Receptor AntagonistsMusclesBinding, CompetitiveMuscle, SmoothPurinergic P2 Receptor AntagonistsNorepinephrineRadioligand AssayMotor EndplateCholine O-AcetyltransferaseSerotonin 5-HT3 Receptor AntagonistsEndothelium, VascularNitroprussideOxotremorinePirenzepineCells, CulturedQuinuclidinyl BenzilateParasympathetic Nervous SystemAdenosine A1 Receptor AntagonistsSerotonin 5-HT2 Receptor AntagonistsSerotoninN-MethylscopolamineElectrophysiologyTime FactorsDrug InteractionsCholinergic FibersNitric Oxide