Seasonal variations in the drug-interactions on blood vessels of the frog (Rana tigrina).
D000109:Acetylcholine / Q000494:pharmacology; D000317:Adrenergic alpha-Antagonists / Q000494:pharmacology; D000818:Animals; D001001:Anura; D001464:Barium / Q000494:pharmacology; D001626:Bethanechol Compounds / Q000494:pharmacology; D001808:Blood Vessels / Q000187:drug effects*; D002217:Carbachol / Q000494:pharmacology; D004347:Drug Interactions; D004837:Epinephrine / Q000494:pharmacology; D008688:Methacholine Compounds / Q000494:pharmacology; D010276:Parasympatholytics / Q000494:pharmacology*; D012621:Seasons; D014662:Vasoconstrictor Agents / Q000494:pharmacology*
D000317:Adrenergic alpha-Antagonists; D001626:Bethanechol Compounds; D008688:Methacholine Compounds; D010276:Parasympatholytics; D014662:Vasoconstrictor Agents; D001464:Barium; D002217:Carbachol; D000109:Acetylcholine; D004837:Epinephrine