A person with a heart rate of 100 beats per minute and a stroke volume of 50 mL has a cardiac output of:
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Correct answer: Aortic and Pulmonary semilunar valves
As ventricular pressure rises during systole, the AV valves close and the semilunar valves — the aortic and pulmonary — are forced open, allowing blood to enter the systemic and pulmonary circulation respectively.
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