title: Extracellular Ca2+ and excitation-contraction coupling.
mesh_terms: D000818:Animals; D002118:Calcium / Q000502:physiology*; D002816:Chordata, Nonvertebrate; D004533:Egtazic Acid / Q000494:pharmacology; D005110:Extracellular Space / Q000502:physiology; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009119:Muscle Contraction / Q000187:drug effects; D009132:Muscles / Q000502:physiology*; D011896:Rana temporaria; D012508:Sarcolemma / Q000502:physiology
chemical_list: D004533:Egtazic Acid; D002118:Calcium