Which of the Following Accounts for the Heart Sounds "Lubb-Dubb

question 9

Multiple Choice

Which of the following accounts for the heart sounds "lubb-dubb"?

• A) closing of the semilunar and atrioventricular valves, respectively
• B) opening of the semilunar and atrioventricular valves, respectively
• C) closing of the atrioventricular and semilunar valves, respectively
• D) opening of the atrioventricular and semilunar valves, respectively

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