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At the point labeled E the 120 В Aortic pressure 60 A DE Atrial pressure Ventricular pressure O semilunar valves are open atrioventricular valves are open O atria are in systole O ventricles are in isovolumic contraction

At the point labeled E the 120 В Aortic pressure 60 A DE Atrial pressure Ventricular pressure O semilunar valves are open atrioventricular valves are open O atria are in systole O ventricles are in isovolumic contraction

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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**QUESTION 25** At the point labeled E the ___. **Diagram Explanation:** The diagram is a graphical representation of cardiac cycle pressures over time, showing the changing pressures in the aorta (black line), atria (green line), and ventricles (red line). The y-axis represents pressure in millimeters of mercury (mm Hg), ranging from 0 to 120 mm Hg. The x-axis represents time. Key points are marked A, B, C, D, and E, indicating different phases or events in the cardiac cycle. - **Point A:** The start of ventricular systole (contraction). - **Point B:** Rapid rise in ventricular pressure as the ventricles contract. - **Point C:** Peak ventricular and aortic pressure. - **Point D:** Decline in ventricular pressure as the ventricles begin to relax. - **Point E:** Corresponds to the beginning of ventricular diastole (relaxation). **Multiple Choice Answers:** - ○ semilunar valves are open - ○ atrioventricular valves are open - ○ atria are in systole - ○ ventricles are in isovolumic contraction **Correct Answer:** - ○ atrioventricular valves are open
Transcribed Image Text:**QUESTION 25** At the point labeled E the ___. **Diagram Explanation:** The diagram is a graphical representation of cardiac cycle pressures over time, showing the changing pressures in the aorta (black line), atria (green line), and ventricles (red line). The y-axis represents pressure in millimeters of mercury (mm Hg), ranging from 0 to 120 mm Hg. The x-axis represents time. Key points are marked A, B, C, D, and E, indicating different phases or events in the cardiac cycle. - **Point A:** The start of ventricular systole (contraction). - **Point B:** Rapid rise in ventricular pressure as the ventricles contract. - **Point C:** Peak ventricular and aortic pressure. - **Point D:** Decline in ventricular pressure as the ventricles begin to relax. - **Point E:** Corresponds to the beginning of ventricular diastole (relaxation). **Multiple Choice Answers:** - ○ semilunar valves are open - ○ atrioventricular valves are open - ○ atria are in systole - ○ ventricles are in isovolumic contraction **Correct Answer:** - ○ atrioventricular valves are open
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