The first heart sound is :- | vedclass

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Question

(B) The heart produces two main sounds during each cardiac cycle, which can be heard through a stethoscope.$1$. The first heart sound is known as '$Lu

Vedclass · Accepted Answer

'Lubb' sound produced at the beginning of ventricular systole

Vedclass · Answer

(B) The heart produces two main sounds during each cardiac cycle, which can be heard through a stethoscope.$1$. The first heart sound is known as '$Lubb$'. It is produced by the closure of the atrioventricular $(AV)$ valves (tricuspid and bicuspid valves) at the beginning of ventricular systole.$2$. The second heart sound is known as '$Dub$'. It is produced by the closure of the semilunar valves at the end of ventricular systole.Therefore, the first heart sound is the '$Lubb$' sound produced at the beginning of ventricular systole.

The first heart sound is $:-$

Similar Questions

Following are the stages of the pathway for the conduction of an action potential through the heart:
$A.$ $AV$ bundle
$B.$ Purkinje fibres
$C.$ $AV$ node
$D.$ Bundle branches
$E.$ $SA$ node
Choose the correct sequence of the pathway from the options given below:

Analogy type questions:
$(1)$ Right atrium and right corner : $SA$ node :: Corner of right atrium : .......
$(2)$ First heart sound : $Lubb$ :: Second heart sound : ...........

In which chamber of the heart is more blood present?

Which of the following organs contains all four types of tissues?

How can the origin and conduction of the heartbeat be represented?

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