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Effect of Sodium Influx on a Neuron Membrane

Topic: Physiology

Created on Monday, September 1 2014 by jdmiles

Last modified on Monday, September 1 2014.

Influx of Sodium (Na+) across a neuron membrane has a(n) __________ effect

 
        A) Negligible
 
        B) Highly suspicious
 
        C) Depressing
 
        D) Excitatory
 
        E) Psychedelic
 

 


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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) Negligible

This answer is incorrect.


When sodium (Na+) ions flow from the extracellular space into the cytoplasm of a cell, the effect is excitatory. The cell membrane becomes depolarized, or less negative.  (See References)

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B) Highly suspicious

This answer is incorrect.


When sodium (Na+) ions flow from the extracellular space into the cytoplasm of a cell, the effect is excitatory. The cell membrane becomes depolarized, or less negative.  (See References)

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C) Depressing

This answer is incorrect.


When sodium (Na+) ions flow from the extracellular space into the cytoplasm of a cell, the effect is excitatory. The cell membrane becomes depolarized, or less negative.  (See References)

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D) Excitatory

This answer is correct.


When sodium (Na+) ions flow from the extracellular space into the cytoplasm of a cell, the effect is excitatory. The cell membrane becomes depolarized, or less negative.  (See References)

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E) Psychedelic

This answer is incorrect.


When sodium (Na+) ions flow from the extracellular space into the cytoplasm of a cell, the effect is excitatory. The cell membrane becomes depolarized, or less negative.  (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
Effect of Sodium Influx on a Neuron Membrane
Question ID: 90114165
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 09/01/2014
Modified: 09/01/2014
Estimated Permutations: 600
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