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Exchange of Gases in Amoeba

Lub sound pro...

Question

Lub sound produced by heart is caused by

A

Ventricular systole

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B

Ventricular diastole

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C

Atrial diastole

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D

Atrial systole.

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Solution

The correct option is B Ventricular systole
Normal heart sound can be characterized by a 'lub' 'dub' sound that occurs with heart beat. The sound 'lub' is the first heart sound and is produced due to closure of atrioventicular valves during systole of ventricles.
So the correct answer will be option A.

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