Action potential

Depolarised (+40mv):

1.    The VS Na⁺ channel is shut.

2.    3Na⁺ are actively pumped out of the axon.

3.    2K⁺ions are actively pumped into the axon, making it negative.

4.    K⁺ions diffuse out through the, always open, K⁺channel.

5.    Anions make the axon more negative.

6.    The axon is polarised because the inside is more negative than the outside.

7.    Na/K⁺pump closes.

8.    Axon becomes depolarised because the outside is…