The ion bridge (sometimes called a salt bridge) contains an electrolyte which takes no part in the cell reactions. The chemical reactions in cells like these are displacement reactions.

For the half equation: Al 3+ + 3e-→ Al, this is described as a reduction reaction as aluminium ions are gaining electrons and the gain of electrons is reduction.

A cell's daily operations are accomplished through the biochemical reactions that take place within the cell. Reactions are turned on and off or sped up and slowed down according to the cell's ...