Multiple Choice
The first heart sound
A) occurs when the AV valves open
B) occurs when the semilunar valves close
C) signals the onset of ventricular diastole
D) occurs when the AV valves close, and signals the onset of ventricular systole
E) occurs when the semilunar valves close, and signals the onset of ventricular diastole
Correct Answer:
Verified
Correct Answer:
Verified
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