At a frequency such that the membrane capacitive impedance was high, then the zoospore would cause a change in the conductance of the channel associated with the physical blocking of a part of the channel. The magnitude of this change would depend on the height and width of the channel relative to the diameter of the spore. In addition, based on the COMSOL simulation, the highest current density appears at the gap area between the paired electrodes along X-axis (Figure ) and the bottom of the channel along Z-axis (Figure ), thus a higher response would be triggered when zoospores are in the middle of the gap and closer to the bottom of the channel.