Which of the following is not a difference between graded potentials and action potentials? greater stimulus intensity results in larger graded potentials, but not larger action potentials. graded potentials can result from the opening of chemically gated channels; action potentials require the opening of voltage-gated channels. spatial summation is used to increase the amplitude of a graded potential; temporal summation is used to increase the amplitude of an action potentialgraded potentials occur along dendrites, whereas action potentials occur along axons.