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the action potential starting from the neuron at resting

the action potential starting from the neuron at resting

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Rank the action potential starting from the neuron at resting state

Both voltage-gated K* and Na* channels reset to closed when the membrane potential is restored Na* channels opening causes further depolarization, increasing membrane potential past the threshold potential (-40 mV) A depolarizing stimulus increases local membrane potential, opening a small number of Na* channels With a slight delay, depolarization also opens voltage-gated K* channels As Na* enters the cell the membrane potential reaches +40mV and Na+ channels become inactive K* exits the cell until the membrane potential is restored K* leak channels establish the resting potential of a neuron at -60mV. Continuous action of the Na*-K* pump restores ion distributions to resting state
Transcribed Image Text:Both voltage-gated K* and Na* channels reset to closed when the membrane potential is restored Na* channels opening causes further depolarization, increasing membrane potential past the threshold potential (-40 mV) A depolarizing stimulus increases local membrane potential, opening a small number of Na* channels With a slight delay, depolarization also opens voltage-gated K* channels As Na* enters the cell the membrane potential reaches +40mV and Na+ channels become inactive K* exits the cell until the membrane potential is restored K* leak channels establish the resting potential of a neuron at -60mV. Continuous action of the Na*-K* pump restores ion distributions to resting state
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