Bio A2 Question in Action Potential in Neurones!

[Romeo10]

When there is an action potential occuring in the neurone and its voltage is increasing as Sodium ions are flooding into the cell, so after this happens the membrane needs to be repolarised and in repolarisation the membrane Potassium ions rush out out of the axon through channels.
My Question where did the potassium ions come from ?? I know there are sodium ions in the axon but where the K+ ions come form ? :unknown:
Thx in advance.

 

[AAestar]

Actually, it is Potassium ion in the axon. Potassium ions and organic anion are present in high concentration inside the cell, meaning inside the axon. Sodium ions, chloride ions and calcium ions are present in high concentration on the outside of the cell than the inside.