title: On the difficulty of assessing the role of extracellular calcium in cell function.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D002118:Calcium / Q000378:metabolism* / Q000494:pharmacology; D002462:Cell Membrane / Q000378:metabolism; D005110:Extracellular Space / Q000378:metabolism*; D066298:In Vitro Techniques; D007476:Ionophores / Q000494:pharmacology
chemical_list: D007476:Ionophores; D002118:Calcium