What is the 'Absolute Refractory Period' of a neuron?
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Correct answer: The time during which no action potential can be initiated, regardless of stimulus strength
The absolute refractory period occurs when voltage-gated Na⁺ channels are either already open or in their inactivated state. During this window no second action potential can be triggered no matter how strong the stimulus, ensuring action potentials are discrete, unidirectional events.
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