ANATOMY

Detailed explanation-1: -The subsequent return to resting potential, repolarization, is mediated by the opening of potassium ion channels. To reestablish the appropriate balance of ions, an ATP-driven pump (Na/K-ATPase ) induces movement of sodium ions out of the cell and potassium ions into the cell.

Detailed explanation-2: -Repolarization is a stage of an action potential in which the cell experiences a decrease of voltage due to the efflux of potassium (K+) ions along its electrochemical gradient. This phase occurs after the cell reaches its highest voltage from depolarization.

Detailed explanation-3: -What happens during repolarization? During repolarization, potassium ions move out of the cell via potassium channels. This movement is down the concentration gradient to restore the charges across the cell membrane.

Detailed explanation-4: -Repolarization is caused by the closing of sodium ion channels and the opening of potassium ion channels. Hyperpolarization occurs due to an excess of open potassium channels and potassium efflux from the cell.

Detailed explanation-5: -Answer and Explanation: During repolarization of a neuron, B. potassium ions move out of the cell. The rapid diffusion of potassium ions to the exterior re-establishes the normal negative resting membrane potential.