<prompt> All are true regarding basal electrical rhythm of intestine exceptTone of contraction is related to amplitude of stimulusTone of contraction is related to frequency of stimulusFrequency of contraction is 6minThreshold of contraction is -55Mv  <response>: Tone of contraction is propoional to the number and frequency of action potentials and not the amplitude Ref: Ganong 25th edpage 497 