Measurement of membrane potential in isolated small cells with the help of a peak detector.
D000818:Animals; D004581:Electronics / Q000295:instrumentation*; D004594:Electrophysiology / Q000295:instrumentation; D004847:Epithelial Cells; D066298:In Vitro Techniques; D008564:Membrane Potentials; D009338:Necturus maculosus; D001743:Urinary Bladder / Q000166:cytology