Identify the point in time during an action potential when a positive feedback process is occurring in a neuron.
A. when the neuron is at rest
B. after the peak depolarization of the action potential when it is rapidly repolarizing
C. as the neuron is being depolarized and passes the threshold potential
D. during the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential
E. A positive feedback process is occurring at all the time points given.
Answer: C
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