How do eels and rays generate electric current? 0 15

The potential difference between the inner and outer sides of the cell membrane is maintained due to the uneven concentration of ions both inside and outside the cell.

Electric fish have cells called electrocytes, which are organized in stacks. Each cell is connected to a nerve ending that forms a synapse located on one side of the cell.

When a nerve impulse reaches the synapse, a mediator is released that opens ion channels in the membrane. This leads to a decrease in electrical voltage on one side of the cell, creating a potential difference of up to 0.15 V between the two sides.

Since the cells are connected in series and are excited simultaneously, their potentials add up, reaching values in the hundreds of volts.