Question

Ions needed for nerve conduction is

• A. $N{a}^{+}$
• B. $C{a}^{++}$
• C. $M{n}^{++}$
• D. None of the above

Answer 1

The correct option is A $N{a}^{+}$

At the beginning of the action potential, the $N{a}^{+}$ channels open and $N{a}^{+}$ moves into the axon, causing depolarization.

Repolarization occurs when the $K^{+}$ channels open and $K^{+}$ moves out of the axon. This creates a change in polarity between the outside of the cell and the inside.

So, the correct answer is option A.