Question

During development of action potential in a nerve fibre, positive and negative charges on outer and inner side of axon membrane are reversed due to

• A. Excretion of all K+ ions.
• B. More $K^{+}$ ions enter than Na+ ions leave the axon.
• C. More $N{a}^{+}$ ions enter the axon than $K^{+}$ ions leave the same.
• D. All $N{a}^{+}$ ions enter the axon.

Answer 1

The correct option is C

More $N{a}^{+}$ ions enter the axon than $K^{+}$ ions leave the same.

During action potential , more $N{a}^{+}$ ions enter the axon than $K^{+}$ ions leave the axon.