title: Evaluation of opioid receptor heterogeneity in isolated, field stimulated rat ileum.
mesh_terms: D000818:Animals; D004558:Electric Stimulation; D004723:Endorphins / Q000494:pharmacology; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D009294:Narcotics / Q000494:pharmacology; D051381:Rats; D011957:Receptors, Opioid / Q000187:drug effects*
chemical_list: D004723:Endorphins; D009294:Narcotics; D011957:Receptors, Opioid