Actually, orexin is believed to promote feeding primarily by selling arousal. Mutations in orexin receptors are responsible for narcolepsy within a canine product, knockout in the orexin gene produces narcolepsy in mice, and human beings with narcolepsy have small or absent amounts of orexin peptides in cerebrospinal fluid (Chapter 13). https://jamesl052cwp1.wikiconversation.com/user