$-Based on the graph,how soon could another action potential be easily initiated (at the end of the relative refractory period)after the first stimulus? A)less than 0.5 msec B)1 msec C)2 msec D)3 msec E)4 msec$
-Based on the graph,how soon could another action potential be easily initiated (at the end of the relative refractory period)after the first stimulus?

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