Which of the following is wrong about the cardiac cycle? A: the diastolic period is longer than the systolic period B: The atria and ventricles contract at the same time C: The atria and ventricles can relax at the same time D: The length of cardiac cycle is related to heart rate

The third and fourth ventricles are communicated by A: interventricular foramina B: mesencephalic aquaduct C: median aperture D: lateral apertures E: arachnoid plexus

Which area allows the atria to completely empty as the ventricles fill with blood? A: A-V node B: A-V bundle C: S-A node D: Purkinje fibers

Which of the blood vessels conduct blood away from the ventricles of the heart and lead to the capillaries? A: arteries and veins B: arterioles and venules C: arteries and venules D: arteries and arterioles

Which of<br/>the followings are the mechanisms of ventricular diastolic<br/>dysfunction? () A: Delayed<br/>restoration of Ca 2+ B: Reduced<br/>diastolic potential energy of ventricles C: Dysfunction<br/>of excitation-contraction coupling D: Reduced<br/>ventricular compliance E: Disorder<br/>of dissociation of myosin-actin complex