As the action potential is conducted down the axon it:
A)Increases in size
B)Decreases in size
C)Remains constant in size
D)Decreases conduction velocity

Question

Quizplus · Accepted Answer

The action potential remains constant in size as it travels down the axon due to the all-or-nothing principle. Once the threshold is reached, the action potential fires at its full potential, regardless of the size of the stimulus.

Answer: D
 This choice is incorrect as the conduction velocity of the action potential is dependent on factors like the size of the axon and presence/absence of myelin sheath, and not on the size of the action potential itself.

As the Action Potential Is Conducted Down the Axon It