The third heart sound can be heard ________
A) when blood flows into the ventricles
B) when the AV valves close
C) when the semilunar valves close
D) contraction of the atria
A
Explanation:
B) The third heart sound is not heard when the AV valves close.
C) The third heart sound is not generated by the closing of the semilunar valves.
D) The third heart sound is not caused by the contraction of the atria.
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