Following repolarization, the neuron may become slightly hyperpolarized before it re-establishes its resting membrane potential. Hyperpolarization is due to a difference between how the voltage-gated Na+ and K+ channels work. What is this difference?

Membrane potential

Explanation:

Membrane potential represents charge difference across the membrane, all biological cells are negative inside (cytoplasm) and positive outside (due to difference in ionic distribution)  In a typical neuron cell membrane potential of cytoplasm is negative at rest (when no stimulus is applied) hence called resting membrane potential Resting membrane potential of excitable cells is established by Na+ and K+pump Repolarization starts with the efflux of K+ by the opening of voltage gated K+ channels Voltage gated K+ channels starts to open when voltage gated Na+ channels becomes inactive Hyperpolarization occurs due to excessive efflux of K+ by voltage gated K+ channelsAdditional efflux of K+ occurs due to slow inactivation of voltage gated K+ channels

The answer is telescope.