When the semilunar valves are open, which of the following are occurring?(1) coronary arteries fill(2) AV valves are closed(3) ventricles are in systole(4) ventricles are in diastole(5) blood enters aorta(6) blood enters pulmonary arteries(7) atria contracta. 2, 3, 5, 6,b. 1, 2, 3, 7,c. 1, 3, 5, 6,d. 2, 4, 5, 7.

Multiple ChoiceMore than one choice may apply.Given a volume of 150 ml at the end of diastole, a volume of 50 ml at the end of systole, and a heart rate of 60 bpm, the cardiac output isa. 600 ml/min.b. 6 liters/min.c. 1200 ml/min.d. 3 liters/min.

a. Describe how heart contraction and relaxation influence coronary blood flow.b. Name the major branches of the coronary arteries, and note the heart regions served by each.

Freshly oxygenated blood is first received by thea. atrium,b.atrium, c. right ventricle, d. left ventricle.

The sequence of contraction of the heart chambers isa. random,b. left chambers followed by right chambers, c. both atria followed by both ventricles, d. right atrium, right ventricle, left atrium, left ventricle.

Mrs. Hamad, a middle-aged woman, is admitted to the coronary care unit with a diagnosis of left ventricular failure resulting from a myocardial infarction. Her chart indicates that she was awakened in the middle of the night by severe chest pain. Her skin is pale and cold, and moist sounds of pulmonary edema are heard over the lower regions of both lungs. Explain how failure of the left ventricle might cause these signs and symptoms.

What are the valves in the heart, and what is the function of each?

Multiple ChoiceMore than one choice may apply.Soon after the onset of ventricular systole, thea. AV valves close.b. semilunar valves open.c. first heart sound is heard.d. aortic pressure increases.