Cardiovascular System: Cardiac Cycle 1. Ventricular filling occurs during ventri
ID: 3524789 • Letter: C
Question
Cardiovascular System: Cardiac Cycle 1. Ventricular filling occurs during ventricular a. b. Blood flows through the -, or , valves into the ventricles. 2. During ventricular systole, what closes the AV valves? 3. During ventricular systole (the ventricular ejection phase), what opens the semilunar valves? 4. During isovolumetric relaxation, what closes the semilunar valves? 5. During isovolumetric relaxation, what opens the AV valves? 6. During the four phases listed below, state whether the AV and semilunar valves are open or closed: Phase AV Valves Semilunar Valves Ventricular filling Ventricular ejection Isovolumetric relaxationExplanation / Answer
1)a)ventricular filing occurs during Mid to late ventricular diastole. b)blood flows through the tricuspid or mitral valve into the ventricle(from right atrium to right ventricle is through the tricuspid valve and from left atrium to left ventricle through the mitral valve) 2) During ventricular systole , intraventricular pressure rising closes the AV valves. 3) During ventricular systole,from ventricles contracting causing the rise in blood pressure causing the semilunar valves, 4)During isovolumetric relaxation , the blood pressure in the arteryexceeds the blood pressure in the ventricle then semilunar valves closes. 5)During isovolumetric relaxation, the blood pressure in the ventricles exceeds the blood pressure in the areries so by this opens the Aterioventricular valve. 6) a) During ventricular filling aterioventricular valves opened and semilunar valves are closed. b) During isovolumetric contraction the aterioventricular valves are closed and semilunarvalves are closed c) During ventricular ejection: the aterioventricular valves closed and semilunar valves are open . d) During isovolumetric relaxation: the aterioventricular valves closed and semilunar valves are closed.