AcetylcholineAcetylcholinesteraseCholine O-AcetyltransferaseCholinesterase InhibitorsVesicular Acetylcholine Transport ProteinsCholineNeurotransmitter AgentsReceptors, NicotinicReceptors, Cholinergicalpha7 Nicotinic Acetylcholine ReceptorBungarotoxinsTorpedoReceptors, MuscarinicNicotinic AntagonistsNicotinic AgonistsNeuromuscular JunctionAtropineNicotineElectric OrganPhysostigmineCarbacholSynaptic TransmissionCholinergic AgentsTubocurarineNeurotransmitter Transport ProteinsMuscarinic AntagonistsNeuronsMuscarinic AgonistsReceptor, Muscarinic M2Receptors, NeurotransmitterDose-Response Relationship, DrugVasodilationReceptor, Muscarinic M1Electric StimulationParasympathomimeticsMyasthenia GravisReceptor, Muscarinic M3Vasodilator AgentsMotor EndplateSynaptic VesiclesSynapsesMecamylamineMusclesCalciumMembrane PotentialsPlasma Membrane Neurotransmitter Transport ProteinsAconitineNitroprussideNorepinephrinegamma-Aminobutyric AcidCholinergic AgonistsSerotoninGuinea PigsGlutamic AcidConotoxinsCholinergic FibersParasympathetic Nervous SystemRats, Sprague-DawleyPresynaptic TerminalsOxotremorineParasympatholyticsQuinuclidinyl BenzilateElectrophysiologyAzocinesSynaptic MembranesMuscle ContractionBrainPatch-Clamp TechniquesCobra Neurotoxin ProteinsDopamineHemicholinium 3Endothelium, VascularBicyclo Compounds, HeterocyclicCholinergic AntagonistsAgrinMuscle, SmoothScopolamine HydrobromideSynaptosomesNitric OxideIontophoresisHexamethonium CompoundsN-MethylscopolamineDihydro-beta-ErythroidineMuscle DenervationNerve EndingsXenopus laevisDimethylphenylpiperazinium IodidePirenzepineIon ChannelsNeostigmineMicrodialysisElectrophorusCells, CulturedQuinolizinesGallamine TriethiodideReceptor, Muscarinic M4Nerve Tissue ProteinsAction PotentialsHippocampusTetrodotoxin