MuscarineParasympathomimeticsReceptors, MuscarinicMuscarinic AgonistsPsilocybinePempidineGanglia, SympatheticMuscarinic AntagonistsFruiting Bodies, FungalPirenzepineAcetylcholineAtropineRana ridibundaOxotremorinePhysostigmineRana catesbeianaReceptor, Muscarinic M3Chromaffin SystemReceptor, Muscarinic M2Gallamine TriethiodideAdrenal MedullaCholinergic AgonistsMembrane PotentialsPotassiumAgaricalesMethacholine CompoundsNeuronsCarbacholBethanechol CompoundsCalciumMolecular StructureNicotineParasympatholyticsFuransCatecholaminesDiencephalonSulfur CompoundsSuperior Cervical GanglionQuaternary Ammonium CompoundsDose-Response Relationship, DrugVolatile Organic CompoundsAction Potentials