TLS Online TPP Program

#Question id: 30053


The second heart sound is produced by:

#Unit 7. System Physiology – Animal
  1. Closure of the aortic and pulmonary valves
  2. Closure of the mitral and tricuspid valves
  3. Opening  of the mitral and tricuspid valves
  4. Opening of the aortic and pulmonary valves