Question 9 Heart sounds are made by the ____ valves. A) closing of the AV B) closing of the semilunar C) movement of blood through the D) Both A and B are correct.
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The second heart sound results from vibrations generated by the ______ of the _____ valves. A opening; atrioventricular B opening; atrioventricular and semilunar C closing; atrioventricular D closing; semilunar
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Circle the correct choice in each instance to complete the statement: The first heart sound is associated with closing of the $(A V / \text {semilunar})$ valves and signals the onset of (systole/diastole), whereas the second heart sound is associated with closing of the $(A V / \text {semilunar})$ valves and signals the onset of (systole/diastole).
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40. The second heart sound is caused by Select one: a. the ventricles contracting b. opening of the AV valves c. closing of the semilunar valves d. closing of the AV valves 41. Which term and events apply to a chamber of the heart that is in Systole Select one: a. Contracting; filling with blood b. Relaxing; filling with blood c. Relaxing; ejecting blood d. Contracting; ejecting blood 42. You listen to the heart beating and you hear a "lub-swish-dup". The lub is caused by Select one: a. Firing of the SA node b. Closing of the pulmonary valve c. Closing of the right AV valve d. Closing of the aortic valve
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