The Action Potential

Paul Andersen explains the concept of action potentials, focusing on neurons but also applicable to muscle and endocrine cells. He covers resting potential, the role of the sodium-potassium pump, and ion permeability. The video details the mechanism of action potentials, including voltage-gated channels and the all-or-none law. It also discusses how signals propagate along axons, the importance of myelination, and the role of graded potentials in synaptic activity.

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