AcetylcholineReceptors, CholinergicReceptors, NicotinicMicrodialysisAtropineNeuromuscular JunctionReceptors, MuscarinicReceptor, Muscarinic M2alpha7 Nicotinic Acetylcholine ReceptorCholineMuscarinic AntagonistsMotor EndplateCholinergic FibersBungarotoxinsElectric StimulationTorpedoGuinea PigsPhysostigmineParasympathetic Nervous SystemIleumMyenteric PlexusCholinesterase InhibitorsOxotremorineMuscarinic AgonistsTubocurarineNicotinic AntagonistsSynaptic TransmissionCalciumParasympatholyticsNicotineReticular FormationSynaptosomesCholinergic AgentsElectric OrganAldicarbDose-Response Relationship, DrugVesicular Acetylcholine Transport ProteinsNerve EndingsCarbacholScopolamine HydrobromideCholine O-AcetyltransferaseAutoreceptorsTetrodotoxinDiaphragmAcetylcholinesteraseMuscle ContractionNeurotransmitter AgentsNeostigmineMuscle, SmoothParasympathomimeticsRats, Sprague-DawleyReceptor, Muscarinic M1PonsNicotinic AgonistsPirenzepineDimethylphenylpiperazinium IodidePiperidinesVagus NerveGalaninAutonomic Fibers, PostganglionicPhrenic NerveReceptor, Muscarinic M3Membrane PotentialsMuscarineRats, WistarMercuribenzoatesBethanecholPotassiumTracheaBotulinum Toxinsomega-Conotoxin GVIANeuronsHippocampusNorepinephrinePresynaptic TerminalsHemicholinium 3Histamine ReleasePostsynaptic Potential SummationCerebral CortexReceptor, Muscarinic M4NeurotoxinsMusclesDialysisRana ridibundaGallamine TriethiodideCatsomega-Agatoxin IVASpider VenomsTime FactorsCholinergic NeuronsSubstantia InnominataAdenosine A1 Receptor AntagonistsVeratridineMotor NeuronsKineticsRana pipiensReceptors, Neurokinin-2Calcium Channel BlockersReceptors, GalaninGanglia, Autonomic