Campbell Essential Biology with Physiology (5th Edition)
Campbell Essential Biology with Physiology (5th Edition)
5th Edition
ISBN: 9780321967671
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece, Kelly A. Hogan
Publisher: PEARSON
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Chapter 27, Problem 4SQ
Summary Introduction

Introduction:

Action potential is an electrical stimulus that propagates along the plasma membrane of a neuron. Neuron responds to this electrical stimulus and converts it into an action potential. To generate action potential, a strong stimulus that is any change in the environment is required.

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Action potentials ____. Select one: A.can occur only once B.can move up or down an axon, away from or towards the cell body C.move in a one way direction towards the cell body D.move in a one way direction away from the cell body
During an Action Potential…..  _____ Na+ flows out of the cell _____ Na+ activation gates  and inactivation gates are both open _____ Na+ flows into the cell _____ Calcium flows out of the cell _____ K +  gates are open  _____ Na+ activation gates are closed _____ Na+ inactivation gates are closed _____ K+ flows into the cell _____ K +  gates are closed _____ Na+ activation gates  and inactivation gates are both closed _____ K + flows out of the cell
An action potential begins when______ . a. a neuron reaches threshold potential b. voltage-gated potassium gates open c. voltage-gated sodium gates close d. sodium–potassium pumps stop operating
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