Problem: Shao Mae takes medication to relieve depression. The medication increases her neural activity. However, immediately after firing, a neuron is incapable of responding to stimulation for a short time. Which of the following describes the brief time period when the neuron is unable to fire? the action potential Option A,the action potential the threshold difference Option B,the threshold difference the refractory period Option C,the refractory period depolarization. Need Assignment Help?