Question

Action potential in nerve fibers is unidirectional primarily due to which of the following mechanisms

• A. Immediate decrease in extracellular potassium after repolarization
• B. Activation of sodium channels during depolarization
• C. Inactivation of voltage-gated sodium channels during the refractory period
• D. Increased membrane permeability to ions

Hint:

Refractory period = One-way street for the nerve impulse.

Answer 1

The Correct Option is C