Resting Potential of a Neuron

Topic: Physiology

Created on Monday, September 1 2014 by jdmiles

Last modified on Monday, September 1 2014.

 
        A) 115 V
 
        B) -42mV
 
        C) -90 µV
 
        D) -65 mV
 
        E) 65 mV
 

 

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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) 115 V

This answer is incorrect.

No, 115 V is the standard voltage in household alternating current sockets in the USA. That's a bit much to expect from a single human cell.  (See References)

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B) -42mV

This answer is incorrect.

A human neuron's resting potential is approximately -65 mV. The cell is more electrically negative on the inside of the cell membrane (that is, in the cytoplasm) compared to the outside (the extracellular fluid).  (See References)

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C) -90 µV

This answer is incorrect.

A human neuron's resting potential is approximately -65 mV. Note that the cell's resting potential is on the order of -65 milivolts (mV), not microvolts (µV).  (See References)

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D) -65 mV

This answer is correct.

A human neuron's resting potential is approximately -65 mV. The cell is more electrically negative on the inside of the cell membrane (that is, in the cytoplasm) compared to the outside (the extracellular fluid).  (See References)

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E) 65 mV

This answer is incorrect.

A human neuron's resting potential is approximately -65 mV. The cell is more electrically negative on the inside of the cell membrane (that is, in the cytoplasm) compared to the outside (the extracellular fluid).  (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
Resting Potential of a Neuron
Question ID: 090114010
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 09/01/2014
Modified: 09/01/2014
Estimated Permutations: 600