Opening of sodium channels in the membrane of a neuron results in

A) depolarization.

B) repolarization.

C) hyperpolarization.

D) increased negative charge inside the membrane.

E) none of the above

Depolarization.

Explanation:

The electric membrane potential or cell potential may be defined as the difference in electric potential inside and outside of the cell. The membrane potential is important for the generation of action potential.

The opening of sodium channels in the membrane neuron causes the influx of sodium ions in the cells. This changes the membrane potential towards more positive and the cells depolarize.

Thus, the correct answer is option (A).