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Q.

Which of the following instruments is used to listen to the heartbeat? 

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a

 Endoscope

b

Microphone

c

 Stethoscope

d

 Periscope

answer is C.

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Detailed Solution

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A stethoscope is an instrument that can be used to detect the heartbeat. The sounds generated by the heart's contractions and relaxations can be easily heard through the use of a stethoscope. The sound that the heart makes is caused by these contractions and relaxations. These "lub" and "dub" noises are caused by the tricuspid valve and semilunar valve shutting.

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Which of the following instruments is used to listen to the heartbeat?