title: Hunger and appetite: old concepts/new distinctions.
mesh_terms: D000818:Animals; D001066:Appetite / Q000187:drug effects / Q000502:physiology*; D002490:Central Nervous System / Q000502:physiology; D003466:Cultural Characteristics; D004644:Emotions; D005247:Feeding Behavior / Q000187:drug effects / Q000502:physiology*; D001068:Feeding and Eating Disorders / Q000503:physiopathology; D005502:Food / Q000592:standards; D005518:Food Preferences; D006801:Humans; D006815:Hunger / Q000502:physiology*; D008954:Models, Biological; D012924:Social Conditions