title: Multiple opiate receptors in guinea-pig ileum.
mesh_terms: D000818:Animals; D004343:Drug Implants; D004361:Drug Tolerance; D006168:Guinea Pigs; D007082:Ileum / Q000378:metabolism; D008297:Male; D009020:Morphine / Q000008:administration & dosage; D009022:Morphine Derivatives / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D009270:Naloxone / Q000494:pharmacology; D011957:Receptors, Opioid / Q000378:metabolism*
chemical_list: D004343:Drug Implants; D009022:Morphine Derivatives; D011957:Receptors, Opioid; D009270:Naloxone; D009020:Morphine; C010616:normorphine