The First Heart Sound ("Lubb") Is Associated with

question 130

Multiple Choice

The first heart sound ("lubb") is associated with

• A) atrial systole.
• B) closing of the atrioventricular valves.
• C) opening of the atrioventricular valves.
• D) closing of the semilunar valves.
• E) opening of the semilunar valves.

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Definitions:

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