<P> Graded potentials that make the membrane potential less negative or more positive , thus making the postsynaptic cell more likely to have an action potential , are called excitatory postsynaptic potentials ( EPSPs ) . Depolarizing local potentials sum together , and if the voltage reaches the threshold potential , an action potential occurs in that cell . </P>
<P> Graded potentials that make the membrane potential less negative or more positive , thus making the postsynaptic cell more likely to have an action potential , are called excitatory postsynaptic potentials ( EPSPs ) . Depolarizing local potentials sum together , and if the voltage reaches the threshold potential , an action potential occurs in that cell . </P>
which part of the neuron undergoes graded potentials
which part of the neuron undergoes graded potentials
membrane
membrane