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

A
AV valves open up

B
ventricular walls vibrate due to gushing in of blood from atria

C
semilunar valves close down after the blood flows into vessels from ventricles

D
AV node receives signal from SA node

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Updated on: Apr 5, 2023

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Text SolutionText solutionverified iconVerified

In healthy adults, there are two normal heart sounds often described as lub and dup. These are the first heart sound and second heart sound produced by the closing of the AV valves and semilunar valves respectively.
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Question Text
Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when
Updated OnApr 5, 2023
TopicBody Fluids and Circulation
SubjectBiology
ClassClass 11
Answer TypeText solution:1 Video solution: 4
Upvotes461
Avg. Video Duration5 min