Question

what occurs during the refractory period?
the neuron depolarizes.
neurotransmitters are released by the dendrites.
the charge of the neuron’s interior increases to about +60 millivolts.
the neuron reestablishes the negative - inside/positive - outside condition.

Explanation:

The refractory period is the phase after an action potential where the neuron resets its resting membrane potential. Depolarization happens before the refractory period, neurotransmitters are released from axon terminals (not dendrites), and +60mV is the peak of depolarization (not the refractory state). The key event of this period is restoring the resting potential's negative-inside, positive-outside charge distribution.

Answer:

The neuron reestablishes the negative-inside/positive-outside condition.