Which of the following properties of a neuron's action potential determines the maximum firing rate (e.g. determines the number of action potentials that can be fired per second)? a. The duration that it takes for the neuron to integrate all the EPSP and IPSPs and "decide" if threshold has been met. b. The duration it takes for all voltage-gated K+ channels to close during the afterpotential and the Na+/K+ pump to redistribute these ions so as to restore the resting potential. c. The duration that it takes for neurotransmitter to diffuse across a synapse. d. The duration that it takes for all voltage-gated Na+ channels to return to a closed, but active (not inactivated) state after the initial rapid depolarization "spike".

The duration that it takes for all voltage-gated Na+ channels to return to a closed, but active (not inactivated) state after the initial rapid depolarization "spike". ( D )

Explanation:

The property of a neuron's action potential that determines the maximum firing rate is ; The duration that it takes for all voltage-gated Na+ channels to return to a closed, but active (not inactivated) state after the initial rapid depolarization "spike".

The firing rate of a neuron defines the number of spikes that a neuron can produce per second and for a typical neuron that number is from 1 spike to 200 spikes per second