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Q5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting V and why? m' Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise V m OK+ channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K* channels, because positive K+ ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submit

Q5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting V and why? m' Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise V m OK+ channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K* channels, because positive K+ ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submit

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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Q5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting Vm, and why? Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise Im K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K+ channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submit
Transcribed Image Text:Q5.3. After the rising phase, which ion channel is responsible for action potential returning to its resting Vm, and why? Na+ channels, because positive Na* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise V m Na* channels, because positive Na* ions are at higher concentration inside the axon than outside, and so they leave the axon and raise Im K* channels, because positive K* ions are at higher concentration outside the axon than inside, and so they enter the axon and raise Vm K+ channels, because positive K* ions are at higher concentration inside the axon than outside, and so they leave the axon and lower Vm Submit
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Each and every cell in the body remains in the polarised state including axon of a neuron. This mainly occurs due to the operation of sodium potassium pump and potassium leak channels both of which  causes the development of negative charge inside the membrane in comparison to outside and this is called resting membrane potential. 

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