Assertion : Lub is a heart sound which is pro | vedclass

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

Question

(A) $Lub$ and $Dub$ are two heart sounds produced during each cardiac cycle.$Lub$ is the first heart sound,which is produced due to the closure of the

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) $Lub$ and $Dub$ are two heart sounds produced during each cardiac cycle.$Lub$ is the first heart sound,which is produced due to the closure of the atrioventricular valves (tricuspid and bicuspid valves) at the beginning of ventricular systole.It is a low-pitched sound of longer duration (approximately $0.15 \,sec$).Since the assertion states that $Lub$ is produced during the cardiac cycle and the reason correctly identifies its cause as the closure of the atrioventricular valves,both statements are correct and the reason explains the assertion.

Assertion : $Lub$ is a heart sound which is produced during each cardiac cycle.
Reason : It is associated with the closure of the tricuspid and bicuspid valves.

Similar Questions

Select the incorrect statement regarding the heart.

The pre-caval veins collect blood from

The opening of the pulmonary vein is without a valve because

When a frog's heart is taken out of the body, it continues to beat for some time. Select the best option from the following statements.
$(1)$ Frog is a poikilotherm.
$(2)$ Frog does not have any coronary circulation.
$(3)$ Heart is "myogenic" in nature.
$(4)$ Heart is autoexcitable.

The first heart sound is $:-$

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : $Lub$ is a heart sound which is produced during each cardiac cycle.Reason : It is associated with the closure of the tricuspid and bicuspid valves.