During the relative refractory period of an action potential, a larger than normal stimulus is needed to cause another action po

<span>The refractory period refers to the timeframe after an initial stimulus when a neuron does not respond to any further stimuli.</span><span>
During the relative refractory phase of an action potential, a stimulus greater than usual is required to trigger another action potential. This is because the voltage-gated potassium channels stay open long enough to cause hyperpolarization of the axon's membrane.</span>