Depolarization occurs when the nerve cell reverses these charges; to change them back to an at-rest state, the neuron sends another electrical signal. The entire process occurs when the cell allows specific ions to flow into and out of the cell.

How does depolarisation occur?

Depolarization and hyperpolarization occur when ion channels in the membrane open or close, altering the ability of particular types of ions to enter or exit the cell. ... The opening of channels that let positive ions flow into the cell can cause depolarization.

When depolarization takes place what action occurs?

Depolarization involves opening of voltage-gated sodium channels and results in a rapid influx of positively-charged sodium ions into the cell, creating a positive membrane potential. 3.