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‘Dup’ sound is produced during the closure of
‘Dup’ sound is produced during the closure of
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Solution
The correct option is D Semilunar valves
The period between the end of one heart beat to the end of the next heart beat is called a cardiac cycle. The cardiac cycle is formed of three phases - atrial systole, ventricular systole and joint diastole.
During a ventricular systole, the closing of auriculoventricular valves at the start of the ventricular systole produces the first heart sound called ‘lubb’ or systolic sound.
During a joint diastole, the rapid closure of semilunar valves at the beginning of the ventricular diastole produces the second heart sound called ‘dup’.
Semilunar valves
The period between the end of one heart beat to the end of the next heart beat is called a cardiac cycle. The cardiac cycle is formed of three phases - atrial systole, ventricular systole and joint diastole.
During a ventricular systole, the closing of auriculoventricular valves at the start of the ventricular systole produces the first heart sound called ‘lubb’ or systolic sound.
During a joint diastole, the rapid closure of semilunar valves at the beginning of the ventricular diastole produces the second heart sound called ‘dup’.
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