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NEETZoologyBody Fluids and Circulation

Heart Sound Cause A. First Heart Sound (Lubb) 1. Closure of aortic and pulmonary valves B. Second Heart Sound (Dubb) 2. Abnormal sound due to defective valves C. Murmur 3. Closure of tricuspid and mitral valves D. Gallop 4. Rapid filling of ventricles

Options

  1. AA-1; B-3; C-2; D-4
  2. BA-3; B-2; C-1; D-4
  3. CA-3; B-1; C-4; D-2
  4. DA-3; B-1; C-2; D-4

Correct answer

D. A-3; B-1; C-2; D-4

Step-by-step solution

The first heart sound (Lubb) is due to the closure of the tricuspid and mitral valves. The second heart sound (Dubb) is due to the closure of the aortic and pulmonary valves. A murmur is an abnormal heart sound due to defective valves. A gallop is an additional heart sound associated with the rapid filling of the ventricles.

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