Which of the following combinations of voltage-gated channel densities would most easily allow an action potential to be generated?
A)high density of K⁺,low density of Na⁺
B)low density of K⁺,high density of Na⁺
C)high density of K⁺ and Na⁺
D)low density of K⁺ and Na⁺

Question

Quizplus · Accepted Answer

A high density of Na⁺ channels and a low density of K⁺ channels would lead to a greater influx of positive ions during depolarization, making it easier to reach threshold and generate an action potential. A low density of K⁺ channels would also delay repolarization, creating a longer refractory period and preventing premature firing.

Which of the Following Combinations of Voltage-Gated Channel Densities Would