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As in intact preparations, repetitive firing occurs in adult, but not juvenile bag cell neurons in dissociated cell culture. Current pulses are shown below voltage traces. Because of differences in input resistance, a smaller amount of current was required to trigger an action potential in juvenile neurons (B) compared to adult neurons (A). The response of a juvenile neuron that was injected with current equal to that used in adult neurons (0.5 nA) is shown in C.
