What causes the closure of the tricuspid and bicuspid valves during ventricular systole?

What causes the closure of the tricuspid and bicuspid valves during ventricular systole?
  1. The opening of the semilunar valves
  2. The flow of blood in the ventricles
  3. The ventricular pressure increase
  4. The closure of the semilunar valves

Solution

Ventricular systole increases the ventricular pressure causing the closure of tricuspid and bicuspid valves due to attempted backflow of blood into the atria.

Asked in: NCERT

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