title: Changes in clonidine effect on longitudinal muscle-myenteric plexus strip preparation by morphine treatments.
mesh_terms: D000818:Animals; D003000:Clonidine / Q000494:pharmacology*; D006168:Guinea Pigs; D009020:Morphine / Q000494:pharmacology*; D009130:Muscle, Smooth / Q000187:drug effects*; D009197:Myenteric Plexus / Q000187:drug effects*; D009270:Naloxone / Q000494:pharmacology; D011224:Prazosin / Q000494:pharmacology; D015016:Yohimbine / Q000494:pharmacology
chemical_list: D015016:Yohimbine; D009270:Naloxone; D009020:Morphine; D003000:Clonidine; D011224:Prazosin