Synergistic effects of cooling and caffeine on the contraction of the frog's heart.
D000818:Animals; D001001:Anura; D002110:Caffeine / Q000494:pharmacology*; D002118:Calcium / Q000502:physiology; D003080:Cold Temperature; D003286:Contracture / Q000139:chemically induced; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D009119:Muscle Contraction; D009124:Muscle Proteins; D009130:Muscle, Smooth / Q000187:drug effects
D009124:Muscle Proteins; D002110:Caffeine; D002118:Calcium