Question

Select the correct statement w.r.t. the generation and conduction of nerve impulse.

• A. In a resting nerve fibre, the inner side of the membrane contains more $N{a}^{+}$ ions whereas outer side contains more $K^{+}$ ions
• B. During depolarisation, $K^{+}$ channels open and $N{a}^{+}$ channels remain closed
• C. During repolarisation, $N{a}^{+}$ influx stops and $K^{+}$ outflow starts to achieve original resting state
• D. In resting state, the outer surface of axonal membrane possesses negative charge while its inner surface is positively charged

Answer 1

The correct option is D In resting state, the outer surface of axonal membrane possesses negative charge while its inner surface is positively charged

In a repolarisation state of nerve fibre, with the increase of sodium ions inside the nerve fibre, the membrane becomes less permeable to sodium ions and more permeable to potassium ions, which stops the $N{a}^{+}$ influx and begins $K^{+}$ outflow until the original resting state is achieved.