Discuss the role of Na* and K* channels in generating an action potential.
Discuss the role of Na* and K* channels in generating an action potential.
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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Discuss the role of Na* and K* channels in generating an action potential.
Expert Solution
Step 1
Action potential:
a. It is a rapid change in the membrane potential in response to threshold stimuli followed by its return to resting membrane potential.
b. The size and shape of the action potential vary from one tissue to another.
c. The stimuli may be due to electrical, mechanical, or chemical.
d. It is important for the transmission of an impulse along nerve fibers, for contraction of muscle, the release of transmitters in synapses, and activation or inhibition of glandular secretions.
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