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प्रश्न
The heart sound 'Dub' is produced when ______.
विकल्प
Semilunar valves open
Atria ventricular valves close
Semilunar valves close
Atria ventricular valves open
उत्तर
The heart sound 'Dub' is produced when Semilunar valves close.
Explanation:
The "dub" sound of the heart is produced by the closure of semilunar valves. At the conclusion of ventricular systole, this happens.
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