Examine the figure below.Once an action potential is triggered,______.
A) the interior of the cell becomes positively charged relative to the outside
B) the interior of the cell becomes negatively charged relative to the outside
C) all ion channels close
D) the cell soon reaches threshold

Question

Examine the figure below.Once an action potential is triggered,______. 
A) the interior of the cell becomes positively charged relative to the outside 
B) the interior of the cell becomes negatively charged relative to the outside 
C) all ion channels close 
D) the cell soon reaches threshold

Quizplus · Accepted Answer

When an action potential is triggered, the voltage-gated sodium channels open, causing an influx of positively charged ions into the cell, which makes the interior of the cell positively charged relative to the outside. This is known as depolarization and is what initiates the action potential. Therefore, choice A is the correct answer.

Examine the Figure Below