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Electromyography and Neuromuscular Disorders - Chapter 2 Quiz - Question 3

Topic: Physiology

Created on Wednesday, April 7 2010 by jdmiles

Last modified on Wednesday, April 7 2010.

Does an unmyelinated axon that is small in diameter conduct action potentials faster or slower than a large unmyelinated axon?

 
        A) Faster
 
        B) Slower
 

 


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This question was created on April 07, 2010 by jdmiles.
This question was last modified on April 07, 2010.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Faster

This answer is incorrect.


The larger in diameter an unmyelinated axon is, the faster it can conduct an action potential.  (See References)

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B) Slower

This answer is correct.


Small unmyelinated axons conduct action potentials more slowly than do large ones.  (See References)

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References:

1. Preston, D.C., and Shapiro, B.E. (2005). Electromyography and Neuromuscular Disorders: Clinical-Electrophysiologic Correlations, 2nd Edition. Elsevier, Philadelphia. Chapter 2.(ISBN:075067492X)Advertising:
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physiology
Electromyography and Neuromuscular Disorders - Chapter 2 Quiz - Question 3
Question ID: 10040805
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 04/07/2010
Modified: 04/07/2010
Estimated Permutations: 0

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