Which of the following happens during the rising phase of the action potential A)P_K⁺is much greater than P_Na⁺. B)P_Na⁺ is much greater than P_K⁺. C)P_K⁺ is the same as P_Na⁺.

Question

Quizplus · Accepted Answer

The rising phase of the action potential is characterized by a rapid influx of Na+ ions into the cell, which depolarizes the membrane potential. Therefore, the permeability to Na+ (P_Na⁺) is much greater than the permeability to K+ (P_K⁺) during this phase.

Which of the Following Happens During the Rising Phase of the Action