title: Exploration as a functional correlate of endorphins.
mesh_terms: D000818:Animals; D004723:Endorphins / Q000502:physiology*; D005106:Exploratory Behavior / Q000187:drug effects / Q000502:physiology*; D009294:Narcotics / Q000494:pharmacology; D051381:Rats
chemical_list: D004723:Endorphins; D009294:Narcotics