Differences in the inhibitory effects of normorphine and opioid peptides on the responses of the vasa deferentia of two strains of mice.
D000818:Animals; D003864:Depression, Chemical; D004723:Endorphins / Q000494:pharmacology*; D004745:Enkephalins / Q000494:pharmacology*; D066298:In Vitro Techniques; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009022:Morphine Derivatives / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D013045:Species Specificity
D004723:Endorphins; D004745:Enkephalins; D009022:Morphine Derivatives