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The ST segment in the EKG is typically quiet and on the isoelectric line (like the T-P segment).  What is happening during the ST segment in the EKG such that we see no waves? a) There is no electrical activity happening

The ST segment in the EKG is typically quiet and on the isoelectric line (like the T-P segment).  What is happening during the ST segment in the EKG such that we see no waves? a) There is no electrical activity happening

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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The ST segment in the EKG is typically quiet and on the isoelectric line (like the T-P segment).  What is happening during the ST segment in the EKG such that we see no waves?

a) There is no electrical activity happening in the ventricles between the S and T waves
b) The heart is relaxed and filling with blood
c) The ST segment is representative of the plateau of the many ventricular action potentials happening at that point
d) There is no longer Na+ influx during the ST segment so no waves are visible
e) The ST segment is during ventricular repolarization and repolarization is not seen on the EKG 
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