Action Potentials Are Normally Carried in Only One Direction: from the Axon

question 16

Multiple Choice

Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals.If you experimentally depolarize the middle of the axon to threshold,then

• A)no action potential will be initiated.
• B)an action potential will be initiated and proceed only in the normal direction toward the axon terminal.
• C)an action potential will be initiated and proceed only back toward the axon hillock.
• D)two action potentials will be initiated,one going toward the axon terminal and one going back toward the hillock.
• E)an action potential will be initiated,but it will die out before it reaches the axon terminal.

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Definitions:

Nonmyelinated Axons

Axons that lack a myelin sheath, causing them to conduct nerve impulses more slowly than myelinated axons.

Fast Nerve Fibers

Nerve cells that transmit signals rapidly, involved in the processing of information that requires quick responses, such as sharp, immediate pain or motor coordination.

Pain Sensations

The unpleasant sensory and emotional experience associated with actual or potential tissue damage or described in terms of such damage.

Distract

The act of diverting attention away from a primary focus or task, leading to a decrease in concentration or performance.