Biology - Neural Control and Coordination Question with Solution | TestHub

In a resting or polarized state, the neuronal membrane is more permeable to K${}^{+}$ ions and nearly impermeable to Na${}^{+}$ ions. The axoplasm inside the axon contains a high concentration of K${}^{+}$ and negatively charged proteins, while the extracellular fluid outside contains a high concentration of Na${}^{+}$.

Due to this unequal distribution of ions and the presence of negatively charged proteins inside, the outer surface of the axonal membrane becomes positively charged, while the inner surface becomes negatively charged.

Therefore, the statement that a resting nerve membrane has a negative charge towards the outside and a positive charge towards the inside is incorrect.

Answer: In a polarized state, a resting nerve membrane has negative charge towards the outside and positive charge towards the inside.