realizes has_specified_input inheres in function intra cellular electrophysiology recording assay patch clamp device patch clamp assay An intracellular electrophysiology assay where a glass micropipette is sealed to the surface of the cell membrane as a recording electrode to study ion channel activity. The key distinction of this technique is the electrical resistance of the seal between the cell membrane and the pipette is of the order 10-100 gigaohms, permitting high-resolution current measurements over the cell membrane in several different standard configurations.