B. Closing of the AV valves C. Opening of the semilunar valves D. Closing of the semilunar valves E. Tearing of the valves 14. The second heart sound A. Occurs while the mitral and tricuspid valves are opening B. Occurs at the beginning of ventricular systole C. Is a result of the closure of the semilunar valves D. Occurs when the pressure in the ventricle exceeds that in the aorta and pulmonary artery E. All of the above 15. Cardiac output (CO) is best expressed by which of the following equations? A. CO = Heart rate + stroke volume B. CO = Heart rate – stroke volume C. CO = Heart rate X stroke volume D. CO = Heart rate divided by stroke volume E. All of the above 16. Which one of the following accounts for the dicrotic notch of the cardiac cycle? A. Opening of the tricuspid valve B. Closing of the bicuspid valve C. Opening of the aortic semilunar valve D. Closing of the pulmonary trunk semilunar valve E. None of the above 17. Systole is the name of the period during A. Ventricular contraction B. Atrial contraction C. Ventricular relaxation D. Atrial relaxation E. The time the heart stops beating 18. The first event in the development of atherosclerosis is A. High blood pressure B. Plaque formation C. Damage to the endothelial lining the artery D. Thrombus formation 19. In which of the following locations is there no valve? A. Between the left atrium and left ventricle B. Between the left ventricle and aorta C. Between the right atrium and right ventricle D. Between the pulmonary veins and left atrium E. None of the above
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Closing of the AV valves: This occurs during ventricular systole when the pressure in the ventricles exceeds that in the atria, causing the mitral and tricuspid valves to close. Show more…
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Exterior: e. The boundary between atria and ventricles is called f. What marks the boundary between the ventricles on the anterior wall of the heart? g. What marks the boundary between the ventricles on the posterior wall of the heart? 9. Structure & Function of the Atria a. The right and left atria are the chambers of the heart. (discharging / receiving) b. Muscular pouches extending from the atria are called . Their function is to c. Atria are (thin- / thick-) walled chambers because d. The fossa ovalis is located in the right atrium. e. The foramen ovale is that existed in the f. How do the left and right atria differ in their function? 10. Structure & Function of the Ventricles a. The right and left ventricles are the (discharging / receiving) chambers of the heart. b. Ventricles are (thin- / thick-) walled chambers because c. are thin strands of collagen fibers that attach the atrioventricular valves to muscles in the wall of the ventricles. 11. Heart Valves a. Name the 2 major types of valves. i. ii. 12. Semilunar valves are found only in (arteries or veins). The tricuspid valve is found on the side of the heart; the bicuspid valve is found on the side of the heart. 13. AV valves prevent backflow into the , whereas the semilunar valves prevent backflow into the .
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