Question

Which of the following ions participate in transmission of nerve signals?

• A. Sodium
• B. Potassium
• C. Magnesium
• D. Iron

Answer 1

Answer: (A), (B)

Sodium
Potassium

Option $\left(A\right),\left(B\right)$ are correct.

Sodium and potassium ions participate in the transmission of nerve signals. It is done by sodium/potassium pump.The membrane of an unstimulated neuron is polarized.Polarization is established by maintaining an excess of sodium ions on the outside and an excess of potassium ions on the inside. A certain amount of $N{a}^{+}$ and $K^{+}$ is always leaking across the membrane through leakage channels, but $N{a}^{+}/K^{+}$ pumps in the membrane actively restore the ions to the appropriate side.