ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
ANATOMY & PHYSIOLOGY LL W/CONNECT ACCESS
4th Edition
ISBN: 9781265521363
Author: McKinley
Publisher: MCG
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Chapter 12.6, Problem 16WDYL
Summary Introduction

To describe:

The three stages of voltage-gated Na+ channels in neurons.

Concept introduction:

The unequal distribution of positive and negative charge across the cell membrane results in membrane potential of a cell. The rise and fall in the membrane potential of an axon in a specific location cause a series of electrical response or action potential.

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Describe the three states of voltage-gated Na+ channels in neurons.
Describe the action potential in terms of the different functional states of the voltage- gated Na+ membrane channels (Note: there are three states)
At the peak of an action potential, would the relative permeability of Na be higher than K? Which ion would be the least permeable to the membrane during falling phase?

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