State whether the following statement is true or false. If false rewrite the correct form of the statement by changing the last word.
The sound produced when the atrioventricular valves close in the heart is called dub.

True

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False

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Solution

The correct option is A True
Dub is The second heart tone, or S2 (A2 and P2), caused by the closure of the aortic valve and pulmonary valve at the end of ventricular systole.
Hence, this statement is true

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