Release of endogenous opioid peptides in guinea-pig duodenum and ileum.
D000818:Animals; D003864:Depression, Chemical; D004386:Duodenum / Q000187:drug effects / Q000378:metabolism*; D004723:Endorphins / Q000378:metabolism*; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects / Q000378:metabolism*; D066298:In Vitro Techniques; D009270:Naloxone / Q000494:pharmacology
D004723:Endorphins; D009270:Naloxone