Topics: Circulatory / Respiratory Quiz
The “lub,” or first heart sound , is produced by the closing of
A. the aortic semilunar valve
B. the pulmonary semilunar valve
C. the tricuspid valve
D. the bicuspid valve
E. both AV valves
Select your answer:
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A. 200
B. 10
C. 1000
D. 10000
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True or False-There could be possible benefits to GMOs.
A. TRUE
B. FALSE