Chapter 13 Review

1. The second heart sound (dup) is created by the: a. closing of the A-V valves b. opening of the A-V valves c. closing of the semilunar valves d. opening of the semilunar valves

2. The layer of the blood vessel wall that determines the diameter of the lumen is the: a. tunica externa b. tunica interna c. tunica media d. none of the above

3. Resting pulse rate in an average adult is: a beats per minute b BPM c BPM d BPM

4. Valves are present in: a. arteries b. arterioles c. veins d. capillaries

5. On an ECG, depolarization of the ventricles is represented by the: a. QRS complex b. T wave c. P wave d. S-T segment

6. On an ECG, depolarization of the atria is represented by: a. QRS complex b. T wave c. P wave d. S-T segment

7. On an ECG, repolarization of the ventricles is represented by the: a. QRS complex b. T wave c. P wave d. S-T segment

8. The function of baroreceptors is to monitor changes in: a. heart rate b. stroke volume c. blood pressure d. blood viscosity

9. Baroreceptors are located in the: a. wall of the right ventricle b. medulla oblongata c. walls of the capillaries d. wall of the aorta and carotid arteries

10. Baroreceptors send nerve impulses to the: a. medulla oblongata only b. chemoreceptors only c. S-A node only d. Both the medulla oblongata and the S-A node

11. The vasomotor center directly controls: a. heart rate by stimulating the S-A node b. stroke volume by regulating total blood volume c. peripheral resistance by changing the diameter of blood vessels d. peripheral resistance by altering blood viscosity

12. The correct sequence of parts that function to carry cardiac impulses is a. S-A node, A-V node, A-V bundle, Purkinje fibers b. S-A node, Purkinje fibers, A-V node, A-V bundle c. A-V node, S-A node, Purkinje fibers, A-V bundle d. A-V node, A-V bundle, Purkinje fibers, S-A node

13. The decrease in the speed of conduction from the A-V node through the A-V bundle results in: a. failure of the ventricles to contract b. adequate time for the ventricles to fill c. delayed opening of the A-V valves d. a decrease in the rate of blood flow from the atria to the ventricles

14. The initiation of the heart beat is the responsibility of the: a. cardiovascular center b. baroreceptors c. vagus nerve d. S-A node

14. Blood flows from the pulmonary veins into the: a. pulmonary arteries b. right atrium c. lungs d. left atrium

15. The bicuspid valve is located between the: a. right ventricle and the aorta b. right ventricle and the pulmonary trunk c. left atrium and the left ventricle d. right and left atria

16. The myocardium is made of: a. smooth muscle b. cardiac muscle c. skeletal muscle d. endothelium

17. The atrioventricular valves close when the: a. S-A node fires b. Atria contract c. Ventricles relax d. Ventricles contract

18. During the normal cardiac cycle, the atria contract when they are directly stimulated by the: a. S-A node b. A-V node c. Conduction myofibers d. Baroreceptors

19. From the coronary sinus, blood normally flows next into the: a. aorta b. pulmonary trunk c. right atrium d. left atrium

20. The tunica interna of a blood vessel is made of: a. smooth muscle b. cardiac muscle c. skeletal muscle d. endothelium

21. The typical heart sounds are made by the: a. vibration of the chordae tendineae b. flow of blood into the coronary arteries c. opening of the valves d. closing of the valves

22. There is a semilunar valve between the: a. right ventricle and the aorta b. right ventricle and the pulmonary trunk c. left atrium and the left ventricle d. right atrium and right ventricle

23. The initiation of the heart beat is the responsibility of the: a. cardiovascular center b. baroreceptors c. vagus nerve d. S-A node

24. The function of the chordae tendineae is to: a. pull the walls of the ventricles inward during contraction b. open the semilunar valves c. open the A-V valves d. close the A-V valves during ventricular contraction

25. Blood flows from the superior vena cava into the: a. right atrium b. inferior vena cava c. left atrium d. aorta

Which numbers indicate the ventricles?

Which numbers indicate the atria?

Which structure carries deoxygenated blood from the lower part of the body to the heart?

Which vessels bring freshly oxygenated blood back to the heart from the lungs?

Which chamber pumps blood to the lungs?

The bicuspid/mitral valve is found between these two structures?

Which vessel carries blood out to the body?

The structure labeled #6 carries blood to the __?__.

The pulmonary semilunar valve is between which two structures?

1.C 2.C 3.C 4.C 5.A 6.C 7.B 8.C 9. D 10. A 11. C 12. A 13. B 14. C 15. C 16. B 17. D 18. A 19. C 20. D 21. D 22. B 23. D 24. D 25. A & & & Lungs & 6