Which Prevents an Action Potential from Moving Backward Along the Axon

question 56

Multiple Choice

Which prevents an action potential from moving backward along the axon? In other words,why do action potentials move in one direction only,down the axon away from the cell body?

• A)Myelin sheaths prevent the action potential from moving backward.
• B)The refractory period prevents the action potential from moving backward.
• C)In some axons,action potentials do move backward.

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Definitions:

360-Day Year

A simplified accounting method where the year is assumed to have only 360 days for the purpose of interest calculations.

Exact Interest

Interest calculation method based on a 365-day year or actual number of days in a loan period.

365-Day Year

A method of computing interest where the basis for the calculation is a full 365-day year, used to give a more precise daily rate.

360-Day Year

An accounting practice assuming twelve 30-day months, used for simplicity in calculations and financial models.