Cardiac cycle valves,stages etc 2.5 / 5 based on 3 ratings ? BiologyHuman, animal and plant physiologyASAll boards Created by: MarieCreated on: 01-05-10 23:21 When are the AV valves open? Atrial systole and diastole 1 of 9 What event within the heart causes the AV valves to open? When pressure in atria is greater than pressure in ventricles 2 of 9 What causes them to close? When pressure in ventricles is greater than pressure in atria 3 of 9 Are both sets of valves closed during any part of the cycle? Yes, just before diastole 4 of 9 Are both sets of valves open during any part of the cardiac cycle? No 5 of 9 What promotes the movement of blood in the heart? Contraction and relaxation of heart muscles & valves 6 of 9 Pressure in the heart is highest in... Ventricular systole 7 of 9 What stage of the cardiac cycle is shortened by a more rapid heart rate Ventricular diastole 8 of 9 When are the AV valves closed? Ventricular systole 9 of 9
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