Question

Which of the following events increases when there is depolarization of a nerve fiber?

• A. A positive charge in the intercellular fluid and a negative charge outside
• B. A positive charge on both sides
• C. A negative charge on both sides
• D. A negative charge in the intercellular fluid and a positive charge outside

Answer 1

The correct option is A

A positive charge in the intercellular fluid and a negative charge outside

The correct option is A.

Explanation of the correct option:

1. Depolarization refers to the shift in the electric charge distribution of the cell. It is also known as hyperpolarization.
2. When nerve fiber receives a stimulus, an action of potential is generated.
3. Sodium and potassium channels are closed when the cell is at resting potential.
4. The charge of the inside cell is less negative or positive than the exterior of the cell.

Final answer: When there is a depolarization then a positive charge in the intercellular fluid and a negative charge outside increases.