Question 4 (1 point) 4) ListenSaved Select all of the following conditions that occur during the isovolumetric phases of the cardiac cycle. A) The volume of blood in the ventricles during isovolumetric contraction is equal to the ESV. B) The atrioventricular valves are closed. C) The volume of blood in the ventricles during isovolumetric relaxation is equal to the ESV. D) The semilunar valves are closed. E) Blood flows from the ventricles into the arteries.
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Match each description to the correct part of the cardiac cycle. Pressure in the ventricles is greater than pressure in the large arteries, causing blood to flow out into the arteries. Both the AV valves and semilunar valves are closed and the ventricles are relaxing. The atria contract, pushing the last ~20% of blood into the ventricles. Both the AV valves and semilunar valves are closed and the ventricles are contracting. The heart is at rest and pressure is lowest in the ventricles. Therefore, blood moves from veins, through atria, and into ventricles.
Adi S.
Which of these answers are correct? The first heart sound, "lubb," is caused by the closing of the atrioventricular valves. The second heart sound, "dubb," is caused by the closing of the semilunar valves. Regurgitation of the atrioventricular valves does not cause a heart sound. Blood flowing into the ventricles does not cause a heart sound.
When the semilunar valves are open, which of the following are occurring? (1) coronary arteries fill (2) AV valves are closed (3) ventricles are in systole (4) ventricles are in diastole (5) blood enters aorta (6) blood enters pulmonary arteries (7) atria contract (a) $2,3,5,6,$ (b) $1,2,3,7,$(c) $1,3,5,6,$ (d) $2,4,5,7$
John N.
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