key term - Repolarization

Definition

Repolarization is the process during an action potential when a neuron's membrane potential returns to its resting negative state after depolarization. It occurs due to the efflux of potassium ions (K+) through channels in the neuron's membrane.

Related terms

Action Potential:

A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane due to stimulus, allowing neurons to communicate.

Depolarization:

The phase during an action potential when sodium ions (Na+) influx into a neuron, causing its internal charge to become more positive.

Resting Membrane Potential:

The electric potential difference across the neuronal membrane when the neuron is not actively sending signals, typically around -70mV in neurons.