title: Influence of patassium ions on contraction of the vas deferens isolated from guniea-pig.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004357:Drug Synergism; D006168:Guinea Pigs; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects*; D009538:Nicotine / Q000494:pharmacology; D009924:Organ Culture Techniques; D011188:Potassium / Q000494:pharmacology*; D014649:Vas Deferens / Q000187:drug effects*
chemical_list: D009538:Nicotine; D011188:Potassium; D002118:Calcium