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Muscle Fiber Action Potential

Topic: Physiology

Created on Monday, September 1 2014 by jdmiles

Last modified on Monday, September 1 2014.

A muscle action potential results in a muscle fiber ______

 
        A) Expanding
 
        B) Contracting, then expanding
 
        C) Contracting
 
        D) Twerking
 
        E) Fasciculating
 

 


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This question was created on September 01, 2014 by jdmiles.
This question was last modified on September 01, 2014.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Expanding

This answer is incorrect.


Muscle fibers can contract. They do not actively expand or stretch.  (See References)

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B) Contracting, then expanding

This answer is incorrect.


Muscle fibers can contract. They do not actively expand or stretch.  (See References)

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C) Contracting

This answer is correct.


Under normal conditions, a muscle fiber action potential will result in a mechanical contraction of that muscle fiber.  (See References)

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D) Twerking

This answer is incorrect.


Muscle fibers don't twerk.  (See References)

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E) Fasciculating

This answer is incorrect.


Muscle fiber fasciculations are a sign of irritation or damage to the neural structures innervating them. Fasciuclations are not part of the normal operation of a muscle fiber.  (See References)

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References:

1. John Nolte; three-dimentional brain reconstructions by John Sundsten. The human brain: an introduction to its functional anatomy. Philadelphia, PA : Mosby/Elsevier, c2009. (ISBN:0323041310)Advertising:
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physiology
Muscle Fiber Action Potential
Question ID: 90114186
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 09/01/2014
Modified: 09/01/2014
Estimated Permutations: 120
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