Body Fluids And Circulation Ques 81

‘Dup’ sound is produced during closure of velum

(a) Semilunar valves

(b) Bicuspid valve

(c) Tricuspid valve

(d) Both b and c

Show Answer

Answer : a

Hints & Solutions

(a) Heart produces two types of sounds. 1st sound is ‘Lubb’ which is produced by closure of bicuspid and tricuspid valves and 2nd sound is ‘Dup’ which is produced by closure of semilunar valves present at the base of aorta to avoid back flow of blood into the ventricle.

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