The dependence of the contractile force generated by frog auricular trabeculae upon the external calcium concentration.
D000818:Animals; D001001:Anura; D002118:Calcium / Q000494:pharmacology*; D004558:Electric Stimulation; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009119:Muscle Contraction / Q000187:drug effects*; D011188:Potassium / Q000494:pharmacology; D011312:Pressure; D012964:Sodium / Q000494:pharmacology
D012964:Sodium; D011188:Potassium; D002118:Calcium