Muscle RelaxationPurinergic P1 Receptor AgonistsSerotonin Receptor AgonistsDopamine AgonistsSerotonin 5-HT1 Receptor AgonistsSerotonin 5-HT2 Receptor AgonistsDose-Response Relationship, DrugAdenosine A1 Receptor AgonistsGABA AgonistsRats, Sprague-DawleyAdenosine A2 Receptor AgonistsInterleukin-1betaGABA-A Receptor AgonistsCannabinoid Receptor AgonistsGABA-B Receptor AgonistsRelaxationSerotonin 5-HT4 Receptor AgonistsRelaxation TherapyReceptors, Adrenergic, betaVasodilationPurinergic P2 Receptor AgonistsAdrenergic alpha-2 Receptor AgonistsAdrenergic beta-AgonistsAcetylcholineMuscle ContractionRats, WistarAdrenergic beta-3 Receptor AgonistsAdenosineMuscarinic AgonistsHistamine AgonistsReceptors, Opioid, kappaMuscle, SmoothAdenosine A3 Receptor Agonistsbeta 2-MicroglobulinNitric OxideSerotonin AntagonistsCells, CulturedVasodilator AgentsReceptors, Opioid, muNicotinic AgonistsPhenethylaminesCalciumEndothelium, VascularAdrenergic AgonistsReceptors, Purinergic P1Guinea PigsPiperidines2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepineReceptors, Dopamine D2IsoproterenolBaclofenMuscle, Smooth, VascularReceptors, Adrenergic, beta-2Receptors, Opioid, deltaQuinpiroleAdrenergic alpha-AgonistsCyclic AMPSignal TransductionSerotoninExcitatory Amino Acid AgonistsReceptor, Adenosine A2AElectric StimulationReceptors, Dopamine D1Integrin beta3BenzazepinesAdenosine-5'-(N-ethylcarboxamide)NitroarginineTime FactorsCannabinoids8-Hydroxy-2-(di-n-propylamino)tetralinRadioligand AssayEnzyme InhibitorsReceptors, SerotoninPhenylephrineEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Drug InteractionsAdrenergic alpha-1 Receptor AgonistsBiological Factors15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidKineticsNaphthalenesNitroprussidePyrrolidinesIndolesMuscimolQuinoxalinesLigandsReceptors, OpioidCell LineRabbitsMice, Inbred C57BLCholinergic AgonistsBradykininMesenteric ArteriesPurinergic P1 Receptor AntagonistsCarbacholMagnetic Resonance SpectroscopyRNA, MessengerTracheaNorepinephrine