Matching Pairs Nervous system FundamentalsOnline version Resting and Action potential by Dr MAHABOOB KHAN SULAIMAN 1 The interior of the cell becomes less negative due to an influx of sodium ions 2 An exceptionally strong stimulus can trigger a response 3 The neuron cannot respond to a second stimulus, no matter how strong 4 The specific period during which potassium ions diffuse out of the neuron due to a change in membrane permeability 5 Also called a nerve impulse transmitted by axons Repolarization Action potential Relative refractory period Depolarization Absolute refractory period