title: Opioids modulate periodicity rather than efficacy of peristaltic waves in the guinea pig ileum in vitro.
mesh_terms: D000818:Animals; D005260:Female; D005769:Gastrointestinal Motility / Q000187:drug effects*; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects*; D066298:In Vitro Techniques; D008297:Male; D009270:Naloxone / Q000494:pharmacology; D009294:Narcotics / Q000494:pharmacology*; D010507:Periodicity; D010528:Peristalsis / Q000187:drug effects*; D011957:Receptors, Opioid / Q000187:drug effects
chemical_list: D009294:Narcotics; D011957:Receptors, Opioid; D009270:Naloxone