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 $Na^{+}$ ions enter the axon than $K^{+}$ ions have leave the same
• D. All $Na^{+}$ ions enter the axon

Answer 1

Answer: (C)

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 more $Na^{+}$ ions enter the axon than $K^{+}$ ions have leave the same.