Muscle Fiber Action Potential

Topic: Physiology

Created on Monday, September 1 2014 by jdmiles

Last modified on Monday, September 1 2014.

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

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A) 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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B) Twerking

This answer is incorrect.

Muscle fibers don't twerk.  (See References)

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C) Contracting, then expanding

This answer is incorrect.

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

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D) Expanding

This answer is incorrect.

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

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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