Question

multiple choice question
when an action potential abides by the all-or-nothing principle, once it reaches its threshold it moves all the way down the axon

○ without losing any of its intensity.

○ immediately increasing in intensity.

○ losing its intensity before gaining it again.

○ slowly losing half of its intensity.

Explanation:

The all - or - nothing principle of action potentials states that once the threshold is reached, the action potential is generated and propagates along the axon without a decrease in its intensity. The option "immediately increasing in intensity" is incorrect as the action potential has a fixed magnitude once triggered. "Losing its intensity before gaining it again" and "slowly losing half of its intensity" go against the all - or - nothing principle. So the correct option is the one that says the action potential moves down the axon without losing any of its intensity.

Answer:

A. without losing any of its intensity.