1. The ventricles begin to contract during what phase: 2. The ventricular volume does not change during these 2 phases (it is “fixed”), which are: 3. At the point where the mitral valve closes, two things occur. One is the closure of the mitral valve; what is the other? 4. This period (or phase) ends with the closure of the semilunar valve. What is it? 5. The pressure drops during this phase to a point low enough for the AV valve to open. 6. At the point when the aortic valve closes, something also happens, which is represented on the aortic waveform. What is this? 7. You start to see an increase in the final diastolic ventricular pressure at the end of this phase. What is this phase on the Wiggers? 8. What is this increase in pressure in the ventricle from? 8. What signifies the start of the ejection phase? (Or what causes the ventricle to eject?) 9. What is the difference between the end-systolic volume and the end-diastolic volume called? 10. During which 2 phases are all four heart valves closed?

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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1. The ventricles begin to contract during what phase:

2. The ventricular volume does not change during these 2 phases (it is “fixed”), which are:

3. At the point where the mitral valve closes, two things occur. One is the closure of the mitral valve; what is the other?

4. This period (or phase) ends with the closure of the semilunar valve. What is it?

5. The pressure drops during this phase to a point low enough for the AV valve to open.

6. At the point when the aortic valve closes, something also happens, which is represented on the aortic waveform. What is this?

7. You start to see an increase in the final diastolic ventricular pressure at the end of this phase. What is this phase on the Wiggers?

8. What is this increase in pressure in the ventricle from? 8. What signifies the start of the ejection phase? (Or what causes the ventricle to eject?)

9. What is the difference between the end-systolic volume and the end-diastolic volume called?

10. During which 2 phases are all four heart valves closed? 

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