'Dup' sound is produced during closure of

Semilunar valves

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Bicuspid valve

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Tricuspid valve

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Both B and C

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Solution

The correct option is A Semilunar valves
Two distinct sounds can be heard during heart beat with the help of stethoscope. These are 'lubb' and 'dup'.
Lubb is the first sound which has a low pitch and produced by the closure of tricuspid and bicuspid valves (collectively called atrioventricular valves) at the beginning of ventricular systole.
Dup is the second sound which is sharp and has a high pitch. It is produced by closure of semilunar valves by the end of ventricular systole.
So, the correct answer is 'Semilunar valves'.

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Similar questions

The second heart sound (dubb) is associated with the closure of ?
(a) tricuspid valve
(b) semilunar valve
(c) bicuspid valve
(d) tricuspid and bicuspid valve

Q. Which of the following events does not take place during a ventricular systole
i. Due to the ventricular systole, ventricular pressure decreases.
ii. During the end of ventricular systole the semilunar valves open up.
iii. During the start of the ventricular systole the bicuspid and tricuspid valves close
iv. Due to the closure of the atrio-ventricular valves, dup sound is produced.

Heart sounds are produced due to
(a) Closure of tricuspid and bicuspid valves
(b) Rushing of blood through valves producing turbulence
(c) Closure of atrioventricular and semilunar valves
(d) Entry of blood into auricles

‘Dup’ sound is produced during the closure of

Q. Time interval between the closure of semilunar valve and closure of AV valve is?

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