title: Tension changes in isolated bundles of frog and barnacle myofibrils in response to sudden changes in the external free calcium concentration.
mesh_terms: D000818:Animals; D001001:Anura; D001693:Biological Transport, Active; D002118:Calcium / Q000494:pharmacology*; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects*; D009210:Myofibrils / Q000187:drug effects*; D001468:Thoracica
chemical_list: D002118:Calcium