Multiple Choice
When auscultating heart sounds, S1 is caused by blood turbulence associated with closure of the _____ valves soon after ventricular _____ begins.
A) AV; diastole
B) Semilunar; systole
C) AV; systole
D) Semilunar; diastole
Correct Answer:

Verified
Correct Answer:
Verified
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