Q. Duration of cardiac cycle ($\cong \bullet 88$ s) I. Atrial systole $\rightarrow$ …A… sec. II. Atrial diastole $\rightarrow$ …B… sec. III. Ventricular systole $\rightarrow$ …C… sec. IV. Ventricular diastole $\rightarrow$ …D… sec. Total time $= \ \cong \ \bullet$ 88 sec Choose the correct option for A, B, C and D
A) A-0.32, B-0.30, C-0.08, D-0.18
B) A-0.32, B-0.08, C-0.30, D-0.18
C) A-0.18, B-0.08, C-0.30, D-0.32
D) A-0.18, B-0.30, C-0.08, D-0.32
Explanation
Duration of Cardiac Cycle $( \cong 0.88\ \sec)$ [table] (i) | Atrial systole | 0.18 sec ; (ii) | Atrial diastole | 0.08 sec ; (iii) | Ventricular systole | 0.30 sec ; (iv) | Ventricular diastole | 0.32 sec [/table] Various events occur during cardiac cycle [table] Phase | SL Valves | AV Valves | Atria | Ventricles ; Isometric relaxation | Closed | Closed | Diastole | Diastole ; Rapid filling | Closed | Open | Diastole | Diastole ; Diastasis | Closed | Open | Diastole | Diastole ; Atrial systole | Closed | Open | Systole | Diastole ; Ejection | Open | Closed | Diastole | Systole [/table]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.