How Neurons Communicate

Art Connections

Figure Potassium channel blockers, such as amiodarone and procainamide, which are used to treat abnormal electrical activity in the heart, called cardiac dysrhythmia, impede the movement of K+ through voltage-gated K+ channels. Which part of the action potential would you expect potassium channels to affect?

Hint:

Figure Potassium channel blockers slow the repolarization phase, but have no effect on depolarization.