Notes in Propagation of Action Potentials

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Published	09/07/2023	{{c1::Axonal}} membranes are {{c1::leaky}}, and this prevents the effective {{c1::conduction}} of subthreshold depolarizing potentials for more than j…
Published	09/07/2023	The {{c1::action potential}} provides a means of overcoming the inherent leakiness of the axonal membrane
Published	09/07/2023	The action potential propagation requires the coordinated action of two forms of current flow:1. {{c1::passive flow}} of current down the axon2. {{c2:…
Published	09/07/2023	Because resistance is inversely related to diameter, larger axons present {{c1::less}} resistance to passive current flow and the “conduction” (speed …
Published	09/07/2023	As action potentials propagate along an axon, recently excited membrane becomes {{c1::refractory}} for some brief period of time
Published	09/07/2023	The {{c1::absolute}} refractory period is when Na+ channels remain {{c1::inactivated}}. The {{c2::relative}} refractory perid is when K+ channels are …
Published	09/07/2023	{{c1::Myelination}} increases the speed of action potential propagation by reducing the inherent leakiness of the axonal membrane with the addition of…
Published	09/07/2023	In myelinated axons, Na+ channels are concentrated at the {{c1::Nodes of Ranvier}}
Published	09/07/2023	The process of action potentials "jumping" from one node to the next is called {{c1::saltatory conduction}}
Published	09/07/2023	Loss of myelination, such as occurs in demyelinating diseases like multiple sclerosis, severely {{c1::slows}} and might even {{c1::impede}} the propag…
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