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The cardiac cycle refers to the sequence of events that takes place from one heart beat to the next. A full understanding of the cardiac cycle requires thorough examination of atrial systole, atrial diastole, ventricular systole, ventricular diastole, atrial and ventricular volume changes during the cycle, electrical events (depolarization and repolarization) of atria and ventricular myocytes, heart sounds associated with turbulent blood flow caused by the closure of semilunar valves, as well as hydrostatic blood pressure changes within the atria, ventricles, and the aorta. Test you basic understanding of the cardiac cycle by taking this simple quiz.
— share — (1) During the isovolumic contraction (also referred to as isovolumetric contraction) phase of the cardiac cycle:
(A) The atrioventricular valves and semilunar valves are closed.
(B) The atrioventricular valves and semilunar valves are open.
(C) The atrioventricular valves closed and semilunar valves are open.
(D) The atrioventricular valves open and semilunar valves are closed.
(E) None of the above.
(2) During the isovolumic relaxation (also referred to isovolumetric relaxation) phase of the cardiac cycle:
(A) The atrioventricular valves and semilunar valves are closed.
(B) The atrioventricular valves and semilunar valves are open.
(C) The atrioventricular valves closed and semilunar valves are open.
(D) The atrioventricular valves open and semilunar valves are closed.
(E) None of the above.
(3) The cardiac events that occur from the beginning of one heart beat to the beginning of the next heart beat are called the cardiac cycle. During the cardiac cycle:
(A) The atria contract before the ventricles.
(B) The atria and the ventricles contract simultaneously.
(C) The ventricles contract before the atria.
(4) The cardiac events that occur from the beginning of one heart beat to the beginning of the next heart beat are called the cardiac cycle. Which of the following is/are true?
(A) The left atrium and right atrium contract nearly simultaneously.
(B) The left ventricle and right ventricle contract nearly simultaneously.
(C) The atria contract before the ventricles.
(D) The ventricles contract before the atria.
(5) During the cardiac cycle, the contraction phase is referred to as __________. Checking your answers... Posted: Monday, March 21, 2016Last updated: Tuesday, March 11, 2025 — share —