Multiple choice

Which of the following statements is incorrect about nerve impulse?

  1. In normal condition, the outer side of the nerve fibre carries positive charge.

  2. The condition when outer side of nerve fibre carries normal (+) charge is called depolarized state.

  3. Nerve impulse travels at a maximum speed of about 100 metres per second only.

  4. Repolarization of nerve takes place due to active transport of Na+ ions again to the outside.

  5. Conduction of nerve impulse is a wave of depolarization followed by repolarisation.
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B Correct answer
Explanation

The condition when outer side of nerve fibre carries normal positive charge is called polarized state.

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