During the transmission of nerve impulse through a nerve fi…

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Published on: August 14, 2026

During the transmission of nerve impulse through a nerve fiber, the potential on the inner side of the plasma membrane has which type of electric charge?

First positive, then negative and continue to be negative

First negative, then positive and continue to be positive

First positive, then negative and again back to positive

First negative, then positive and again back to negative

Text Solution

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The correct answer is:

During the transmission of nerve impulse through a nerve fiber, the polarity changes as in resting condition the potential on the inner side of the plasma membrane is negative while outer is positive but during nerve impulse transmission the potential on the inner side of the plasma membrane becomes positive due to rapid influx of ions while outer becomes negative known as depolarisation. After this channels closes and repolarisation occurs which again changes the polarity of membrane.
So during the transmission of nerve impulse through a nerve fiber, plasma membrane has first negative, then positive and again back to negative electric charge.