Doctors use a stethoscope to hear the sounds | vedclass

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

Question

(B) The cardiac cycle produces two primary heart sounds,often described as 'lub' and 'dub'.$1$. The first heart sound ('lub') is associated with the c

Vedclass · Accepted Answer

Semilunar valves close down after the blood flows into vessels from the ventricles.

Vedclass · Answer

(B) The cardiac cycle produces two primary heart sounds,often described as 'lub' and 'dub'.$1$. The first heart sound ('lub') is associated with the closure of the atrioventricular $(AV)$ valves (tricuspid and bicuspid valves) at the beginning of ventricular systole.$2$. The second heart sound ('dub') is associated with the closure of the semilunar valves (aortic and pulmonary valves) at the end of ventricular systole,preventing the backflow of blood from the arteries into the ventricles.Therefore,the second sound is heard when the semilunar valves close.

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The second heart sound is heard when:

Similar Questions

What is the $IUPAC$ name of the following compound?

$A$ horizontal force of $10\,N$ is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is $0.2$. The weight of the block is ........ $N$.

The acceleration of a moving body can be found from

Leaching of $Ag_2S$ is carried out by heating it with a dilute solution of

The centre of a circle is $(2, -3)$ and the circumference is $10\pi$. Then the equation of the circle is

Vedclass Test Series

Exam Paper Generator

Online Exam Module