title: Seasonal variation in sensitivity of guinea pig tissues to agonists.
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology*; D000818:Animals; D000830:Animals, Laboratory; D006168:Guinea Pigs / Q000502:physiology*; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D006339:Heart Rate / Q000187:drug effects; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology*; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D011189:Potassium Chloride / Q000494:pharmacology*; D012621:Seasons; D012701:Serotonin / Q000494:pharmacology*; D013268:Stimulation, Chemical
chemical_list: D012701:Serotonin; D011189:Potassium Chloride; D007545:Isoproterenol; D000109:Acetylcholine