Orexin ReceptorsReceptors, NeuropeptideNeuropeptidesBenzoxazolesIntracellular Signaling Peptides and ProteinsHypothalamic Area, LateralReceptors, G-Protein-CoupledHypothalamic HormonesMidline Thalamic NucleiPituitary HormonesHypothalamusUreaMelaninsNarcolepsyCarrier ProteinsWakefulnessRats, WistarNeurotransmitter AgentsNeuronsSleep, REMEatingGastrointestinal MotilitySleepTetrodotoxinRats, Sprague-DawleyPatch-Clamp TechniquesImmunohistochemistryDose-Response Relationship, DrugAction Potentials