Question

164. An action potential in the nerve fibre is
produced when positive and negative charges
on the outside and the inside of the axon
membrane are reversed because :
a) More K enter the axon as compared to
sodium ions leaving it
b) More Na enter the axon as compared to
K+ leaving it
c) all K leaving the axon
d) all Na enter the axon
​

Answer 1

your answer will be(b)