During cardiac cycle opening of the aoic valve takes place at: (A) Beginning of systole, (B) End of isovolumetric contraction, (C) End of diastole, (D) End of diastasis
Answer is B. At the end of the Isovolumetric contraction, aoic and pulmonary valves open so that the ventricles can eject blood into the aoa and pulmonary trunk Ref: Ganong 25th ed/page 540