Nerve and muscle mnemonic

Rest, Depolarise, Peak, Repolarise, Hyperpolarise. It helps you recall: Phases of a neuronal action potential.

Membrane near K⁺ equilibrium, about −70 mV

Na⁺ channels open, Na⁺ enters

Na⁺ channels inactivate near +30 mV

Rest: Membrane near K⁺ equilibrium, about −70 mV; Depolarise: Na⁺ channels open, Na⁺ enters; Peak: Na⁺ channels inactivate near +30 mV; Repolarise: K⁺ channels open, K⁺ leaves; Hyperpolarise: K⁺ channels close slowly, brief undershoot.

It belongs to Nerve and muscle in Physiology.

It lists phases only; it does not explain channel kinetics in detail.

Explains refractory periods and the action of sodium channel blockers.

Say it aloud, write it from memory tomorrow, then again in a week. Then test yourself on a Physiology question about Nerve and muscle.

It is a teaching aid written or adapted by our team. Some resemble ones students share informally. Check any fact that matters in a standard source.