-Which statement best describes the events responsible for the phase represented by the letter "A" in Figure 7.1?
A) the opening of sodium channels
B) the opening and closing of sodium channels
C) the opening of potassium channels
D) the closing of sodium channels and the opening of potassium channels
E) the opening of potassium channels and the closing of sodium channels

Question

-Which statement best describes the events responsible for the phase represented by the letter "A" in Figure 7.1?
A) the opening of sodium channels 
B) the opening and closing of sodium channels 
C) the opening of potassium channels 
D) the closing of sodium channels and the opening of potassium channels 
E) the opening of potassium channels and the closing of sodium channels

Quizplus · Accepted Answer

The opening of sodium channels is responsible for the initial depolarization phase in an action potential, which is typically represented by the letter "A" in such diagrams.

-Which Statement Best Describes the Events Responsible for the Phase