012 The Absolute and Relative Refractory Periods

In this video, Leslie Samuel explains the concepts of absolute and relative refractory periods in neurons. The video begins with an overview of voltage-gated sodium channels, which have three states: closed, open, and inactive. The absolute refractory period occurs when these channels are open or inactive, preventing another action potential. The relative refractory period follows, requiring a stronger stimulus to initiate another action potential as sodium channels reset. The video concludes with a summary of these concepts.

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