The first heart sound (S1) is caused by: O The aortic and pulmonary valves closing as ventricular pressure drops below arterial pressure O The AV valve opening as atrial pressure exceeds ventricular pressure O The aortic and pulmonary valves opening as ventricular pressure exceeds arterial pressure the AV valves closing as ventricular pressure exceeds atrial pressure

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
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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The first heart sound (S1) is caused by:
O The aortic and pulmonary valves closing as ventricular pressure drops below arterial pressure
O The AV valve opening as atrial pressure exceeds ventricular pressure
O The aortic and pulmonary valves opening as ventricular pressure exceeds arterial pressure
O the AV valves closing as ventricular pressure exceeds atrial pressure
Transcribed Image Text:The first heart sound (S1) is caused by: O The aortic and pulmonary valves closing as ventricular pressure drops below arterial pressure O The AV valve opening as atrial pressure exceeds ventricular pressure O The aortic and pulmonary valves opening as ventricular pressure exceeds arterial pressure O the AV valves closing as ventricular pressure exceeds atrial pressure
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heart is the organ which helps in pumping blood to all parts of the body .it produce sounds which is used by doctors to find disorders in heart function .

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