Heart sounds are produced due to

Closure of tricuspid and bicuspid valves.

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Rushing of blood through valves producing turbulence.

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Closure of atrioventricular and semilunar valves.

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Entry of blood into auricles.

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Solution

The correct option is C Closure of atrioventricular and semilunar valves.
The first heart sound Lubb is heard due to the closure of the tricuspid and bicuspid valves during ventricular systole. The second sound dubb is heard due to the closure of the semilunar valves during ventricular diastole.
So, the correct answer is 'Closure of atrioventricular and semilunar valves.'

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Similar questions

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

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.

Q. What is the duration between the closure of atrioventricular valves that is lubb and closure of semilunar valves that is dubb?

Q. Read the following statements carefully and select correct choice from given.
(a) First heart sound lub is produced due to closure of atrioventricular valves.
(b) First heart sound is of longer duration than second heart sound dub.

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