Question

The heart sound 'dupp' is produced when

• A. Tricuspid valve is opened.
• B. Mitral valve is opened.
• C. Mitral valve is closed.
• D. Semi-lunar at the base of aorta get closed.

Answer 1

The correct option is D Semi-lunar at the base of aorta get closed.

Heart sounds are heard on the surface of the chest in the heart region; they are amplified by and heard more distinctly through a stethoscope. They are caused by the vibrations generated during the normal cardiac cycle and may be produced by muscular action, valvular actions, motion of the heart, or blood passing through the heart. The second heart sound (S2) is shorter and higher pitched than the first, is heard as a dupp and is produced by closure of the aortic and pulmonary valves.