Physiology The repolarization phase of an action potential is due to A Increasing sodium permability and increasing potassium permeability B Increasing sodium permeability and decreasing potassium permeability C Decreasing sodium permeability and an immediate increasing potassium permeability D Decreasing sodium permeability and a delayed increase potassium permeability 💡 Explanation The repolarization phase of an action potential is due to ✓ Correct Answer: D. Decreasing sodium permeability and a delayed increase potassium permeability