Which of the following is an incorrect statement w.r.t. the events of cardiac cycle?

Question

Which of the following is an incorrect statement w.r.t. the events of cardiac cycle? (A) The duration of joint diastole is 0.4 second. (B) Fall in ventricular pressure leads to closing of semilunar valves in the beginning of ventricular diastole. (C) The duration of atrial systole is shorter than ventricular diastole. (D) The atrioventricular valves remain open during ventricular systole.

Tardigrade Admin · Accepted Answer

The atrioventricular valves remain closed during ventricular systole. This prevents the backflow of blood from ventricles into atria during ventricular systole.
The time during which the left and right ventricles contract and eject blood into the aorta and pulmonary artery, respectively is represented as systole. During this period, the aortic and pulmonic valves open to permit ejection into the aorta and pulmonary artery and the atrioventricular valves remain closed. Therefore, no blood enters the ventricles.
Solution

Q. Which of the following is an incorrect statement w.r.t. the events of cardiac cycle?

The duration of joint diastole is 0.4 second.

Fall in ventricular pressure leads to closing of semilunar valves in the beginning of ventricular diastole.

The duration of atrial systole is shorter than ventricular diastole.

The atrioventricular valves remain open during ventricular systole.