title: Membrane potential and slow inward current dependence of frog cardiac mechanical activity.
mesh_terms: D000200:Action Potentials; D000818:Animals; D001001:Anura; D016275:Atrial Function; D002118:Calcium / Q000502:physiology; D004558:Electric Stimulation; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009119:Muscle Contraction; D011893:Rana esculenta / Q000502:physiology; D012964:Sodium / Q000502:physiology
chemical_list: D012964:Sodium; D002118:Calcium