. . . "Electrophysiology (from Greek \u1F25\u03BB\u03B5\u03BA\u03C4\u03C1\u03BF\u03BD, \u0113lektron, \"amber\" [see the etymology of \"electron\"]; \u03C6\u03CD\u03C3\u03B9\u03C2, physis, \"nature, origin\"; and -\u03BB\u03BF\u03B3\u03AF\u03B1, -logia) is the study of the electrical properties of biological cells and tissues. It involves measurements of voltage change or electric current on a wide variety of scales from single ion channel proteins to whole organs like the heart."@en .