title: The contribution of activation processes to the length-tension relation of cardiac muscle.
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000494:pharmacology; D002415:Cats; D004558:Electric Stimulation; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D009132:Muscles / Q000502:physiology*; D010210:Papillary Muscles / Q000502:physiology*
chemical_list: D002118:Calcium