Select the INCORRECT statement with respect t | vedclass

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Question

(B) The first heart sound, '$Lub$', is produced by the closure of the atrioventricular $(AV)$ valves (tricuspid and bicuspid valves) at the beginning

Vedclass · Accepted Answer

Lub sound is heard due to closure of Thebesian valve.

Vedclass · Answer

(B) The first heart sound, '$Lub$', is produced by the closure of the atrioventricular $(AV)$ valves (tricuspid and bicuspid valves) at the beginning of ventricular systole.Option '$B$' is incorrect because the '$Lub$' sound is not caused by the closure of the Thebesian valve (which is a valve of the coronary sinus).Option '$A$' is correct as the second heart sound, '$Dub$', is caused by the closure of the semilunar valves.Option '$C$' and '$D$' are correct statements regarding the clinical measurement of blood pressure using a sphygmomanometer.

Select the $INCORRECT$ statement with respect to heart sounds.

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