Problem:
Suppose I have a nerve fiber consisting of several axons all running in parallel to each other. When an action potential is generated in a certain axon, this will alter the concentration of sodium and potassium ions inside the axon, and in the extracellular fluid around that axon.
Question: Will this change in ion concentration in the extracellular fluid, alter the threshold potential of an adjacent axon, which shares the same extracellular fluid? Please explain in detail.