ArteriolesNephronsPimozideKidney GlomerulusTheobromineHydronephrosisRenal CirculationJuxtaglomerular ApparatusKidneyKidney TubulesVasoconstrictionCalcium Channels, T-TypeMicrocirculationMibefradilVasodilationDiltiazemCalcium Channel BlockersAngiotensin IIFeedbackPurinergic P1 Receptor AntagonistsXanthinesPerfusionVasodilator AgentsGlomerular Filtration RateRats, Sprague-DawleyKidney Tubules, DistalVascular ResistancePia MaterBlood PressureRabbitsVenulesRetinal ArteryCalciumLoop of HenleKidney Tubules, ProximalKidney Tubules, CollectingUreterNitric OxideMuscle, Smooth, VascularKidney MedullaCheekKidney CortexInulinPuncturesEndothelium, VascularMicroscopy, VideoVasoconstrictor AgentsCapillariesAbsorptionRegional Blood FlowVasomotor SystemSodiumAcetylcholineOrganogenesisNitroarginineNG-Nitroarginine Methyl EsterKidney Concentrating AbilityNitric Oxide SynthaseCerebral ArteriesNephrectomyNitroprussideMesoporphyrinsEnzyme InhibitorsAminohippuric AcidsEpithelial Sodium ChannelsRats, WistarCoronary VesselsArteriesSwine, MiniatureIndomethacinPronephrosAdenosineFerrocyanidesMesocricetusMuscle, SkeletalHypertensionRats, Inbred WKYRats, Inbred SHRRetinal VesselsDose-Response Relationship, DrugRats, Inbred Strains