Which of the following is responsible for the falling phase of an action potential? A) opening of Na⁺ gates B) Na⁺-K⁺ pump restoring the ions to their original locations C) greatly increased permeability to K⁺ D) ATP-ase destroying the energy supply that was maintaining the action potential at its peak. E) none of these answers.

Question

Quizplus · Accepted Answer

The falling phase of an action potential is primarily due to the opening of voltage-gated K⁺ channels, which increases the permeability to K⁺ and allows K⁺ to exit the cell, repolarizing the membrane.

Which of the Following Is Responsible for the Falling Phase