What happens to potassium during Cajal cell depolarization?

During Cajal cell depolarization, potassium does not flow inside the cell; rather, it moves in the opposite direction. When a cell depolarizes, typically, the membrane potential becomes less negative due to the influx of positive ions, primarily sodium, rather than potassium, which is usually involved in repolarization.

In the context of depolarization, potassium ions are more concentrated inside the cell compared to outside. During this phase, voltage-gated sodium channels open, allowing sodium ions to enter and causing the depolarization. As the cell repolarizes following this phase, potassium channels open, enabling potassium to leave the cell, which helps restore the resting membrane potential.

Thus, during the depolarization of Cajal cells, potassium actually tends to remain unchanged initially, and it is the influx of sodium that primarily contributes to depolarization. Therefore, the correct understanding of potassium's behavior during this process is that it is not flowing inside the cell.