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

1. First positive, then negative and continue to be positive
2. First negative, then positive and continue to be negative
3. First positive, then negative and again back to positive
4. First negative, then positive and again back to negative

Correct answer: First negative, then positive and continue to be negative

Solution

During the transmission of a nerve impulse, the inside of the cell membrane becomes negatively charged, followed by a positive charge, and then remains negative.

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