Of the Four "Normal" Heart Sounds,the Initial "Lubb" Sound Is

question 57

Multiple Choice

Of the four "normal" heart sounds,the initial "lubb" sound is heard when the

• A)AV valves close.
• B)semilunar valves close.
• C)AV valves open.
• D)semilunar valves open.
• E)foramen ovale closes.

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