Question

why does hyperpolarization occur?
multiple choice
potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage - gated sodium ion channels begin to close.
the extra efflux of potassium ions causes the membrane potential to become slightly more positive than the resting value.
the increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level.
more sodium ions diffuse into the cell than potassium ions diffuse out of it.
the inactivation gates of the voltage - gated sodium ion channels begin to open, and the diffusion of sodium ions decreases.

Explanation:

Hyperpolarization occurs because after the inactivation gates of voltage - gated sodium ion channels close, potassium ions continue to diffuse out of the cell. Also, the increased potassium ion permeability lasts slightly longer than the time needed to return the membrane potential to its resting level. This makes the membrane potential more negative than the resting potential.

Answer:

Potassium ions continue to diffuse out of the cell after the inactivation gates of the voltage - gated sodium ion channels begin to close; The increased potassium ion permeability lasts slightly longer than the time required to bring the membrane potential back to its resting level.