Multiple choice

The heart sound murmurs during

  1. closing of bicuspid and tricuspid valves

  2. closing of aortic and pulmonary semilunar valves

  3. leaking of blood through one of valves

  4. none of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Heart murmurs are abnormal heart sounds produced when blood flows turbulently through the heart, often due to leaking or narrowing of heart valves. Normal valve closure produces the characteristic 'lub-dub' sounds (S1 and S2). Murmurs indicate turbulent flow caused by valve incompetence, stenosis, or other structural abnormalities.

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