The first heart sound is :- | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

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.

Column-$I$	Column-$II$
$a$. Superior Vena Cava	$p$. Carries deoxygenated blood towards the lungs
$b$. Inferior Vena Cava	$q$. Carries oxygenated blood away from the lungs
$c$. Pulmonary Artery	$r$. Brings deoxygenated blood from lower body parts to the right atrium
$d$. Pulmonary Vein	$s$. Brings deoxygenated blood from upper body parts to the right atrium

The first heart sound is $:-$

Similar Questions

Which valve opens due to ventricular systole?

What is the heart rate of a rabbit?

Which structure acts as the pacemaker of the heart?

Describe the external structure of the human heart.

Vedclass Test Series

Exam Paper Generator

Online Exam Module