Question

When a neuron is in resting state i.e. not conducting an impluse, the axonal membrane is _________________________.

• A. Comparatively more permeable to $N{a}^{+}$ ions and nearly impermeable to $K^{+}$ ions
• B. Equally permeable to both ion's $N{a}^{+1}$ and $K^{+}$ ions
• C. Impermeable to both $N{a}^{+1}$ and $K^{+}$ ions
• D. Comparatively more permeable to $K^{+}$ ions and nearly impermeable to $N{a}^{+1}$ ions

Answer 1

Answer: (D)

Comparatively more permeable to $K^{+}$ ions and nearly impermeable to $N{a}^{+1}$ ions

Resting state refers to the state when the potential of state is -70 mV. In this state no impulse is conducted and the axonal membranes are more permeable to K+ and impermeable to Na+.
So, the correct option is option D.