Question 1 Explain why during the absolute refractory period, even a very strong stimulus cannot initiate a second action potential. This period coincides with the period of Na' channel activation and inactivation. Inactivated Na' channels cannot reopen; they first must return to the resting state.

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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Question 1
Explain why during the absolute refractory period, even a very strong stimulus cannot initiate a second action
potential.
This period coincides with the period of Na' channel activation and inactivation. Inactivated Na' channels
cannot reopen; they first must return to the resting state.
Transcribed Image Text:Question 1 Explain why during the absolute refractory period, even a very strong stimulus cannot initiate a second action potential. This period coincides with the period of Na' channel activation and inactivation. Inactivated Na' channels cannot reopen; they first must return to the resting state.
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