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Nerves - repolarize

Discussion in 'MCAT Study Question Q&A' started by Sammy1024, Sep 23, 2014.

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  1. Sammy1024

    Sammy1024

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    Dec 12, 2013
    So I did a TBR passage, where they had the following graph:

    upload_2014-9-23_12-50-36.png

    And the question basically asked what is the name of the point in time where the graph does from being hyperpolarized back to the resting membrane potential of -80mV.

    I picked depolarized because they labeled #5 are repolarization, but the answer is repolarize. I was wondering why. I know that's what it is called but I didn't want to pick it since they labeled the decrease of membrane potential as the same thing.

    upload_2014-9-23_12-49-32.png
     
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  3. Strudel19

    Strudel19 5+ Year Member

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    Jul 14, 2011
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    Depolarization basically refers to the rapid influx of Na+ ions that causes the charges inside and outside to flip. Repolarization is the entire process of restoring the membrane potential to the resting membrane potential of -80 mV.
     
    Sammy1024 likes this.

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