<prompt> Biphasic action potential of mixed nerve except?All or none phenomenonTwo or more positive peaksRefractory periodRecorded on surface  <response>: Ans. isbi.e., Two or more positive peaksAction potential when recorded by putting two electrodes on the surface of a neuron instead of putting on surface and one intracellularly, shows a biphasic response, i.e. Biphasic action potential.As the wave of depolarization reached the first electrode, this electrode becomes negative and an upward deflection Peak is recorded. 