Multiple choice

A nerve fibre is depolarized when it acquires

  1. a negative charge in the intracellular fluid and positive charge outside

  2. a positive charge in the intracellular fluid and negative charge outside

  3. positive charge on both sides

  4. negative charge on both sides
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Depolarization occurs when the membrane potential becomes less negative (or more positive) inside the cell relative to the outside, typically due to an influx of sodium ions.

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