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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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preload afterload contractility is the amount of tension in ventricular myocardium immediately before it begins to contract. It is elevated in exercise because so much blood is flowing into the chamber quickly. The chamber walls stretch, which encourages increased is the pressure in the aorta and pulmonary trunk. When it is high, the ventricles must work harder to eject blood.
Transcribed Image Text:preload afterload contractility is the amount of tension in ventricular myocardium immediately before it begins to contract. It is elevated in exercise because so much blood is flowing into the chamber quickly. The chamber walls stretch, which encourages increased is the pressure in the aorta and pulmonary trunk. When it is high, the ventricles must work harder to eject blood.
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