Refer to the following graph of an action potential to answer the question. The membrane's permeability to sodium ions is greatest at label ________.
A) A
B) B
C) C
D) D Disallow randomisation

Question

Refer to the following graph of an action potential to answer the question.  The membrane's permeability to sodium ions is greatest at label ________.
A) A 
B) B 
C) C 
D) D Disallow randomisation

Quizplus · Accepted Answer

The graph shows that the peak of the action potential coincides with the increase in the permeability of sodium ions. Therefore, the label with the highest point in the graph is where the membrane's permeability to sodium ions is greatest, which is at label B.

Refer to the Following Graph of an Action Potential to Answer