2. Name the connective tissue layer that surrounds a fascicle in skeletal muscle. A. Endomysium B. Epimysium C. Perimysium D. Tendon E. Epicardium

3. Name the functional unit of skeletal muscle. A. Sarcolemma B. Saroplasmic Reticulum C. Sarcomere D. Myosin

4. The thick filament is also referred to as A. Actin B. Myosin C. Tropomyosin D. Troponin C E. G Actin

5. Which protein in G-Actin is responsible for blocking the bind site of myosin? A. Tropomyosin B. Troponin C C. Sarcoplasmic Reticulum D. Sarcolemma

6. The thin filament is also called A. Actin B. Myosin C. Tropomyosin D. Troponin C

7. During skeletal muscle contraction Calcium is stored in the A. Sarcolemma B. Sarcomere C. Sarcoplamic reticulum D. Golgi apparatus E. Nucleus

8. The systemic circulation A. Receives more blood than the pulmonary circulation does B. Receives blood from the left ventricle C. Is a high pressure system compared to the pulmonary circulation D. Both (b) and (c) above are correct E. All of the above are correct

9. The chordae tendinae A. K eep the AV valves from opening in the opposite direction during ventricular contraction B. Hold the AV valves during diastole C. Hold the right and left ventricles together D. Transmit the electrical impulse form the atria to the ventricles E. Contract when the ventricles contract

10. The aortic valve prevents backflow of blood from the aorta into the left ventricle during ventricular diastole A. True B. False

11. A mammalian heart has __________ chamber(s) A. One B. Two C. Three D. Four

12. A heart murmur is characterized by A. Rapid heart contraction B. Irregular heart contraction C. Mitral valve prolapse D. Semilunar valve dysfunction

13. The tricuspid valve is closed A. While the ventricle is in diastole B. By the movement of blood from the atrium to ventricle C. By the movement of blood from ventricle to aorta D. While the atrium is contracting E. When the ventricle is in systole

14. In a mammal, blood pressure is lowest in the A. Aorta B. Vena cavae C. Capillaries of the arm D. Veins of the leg

15. Which of the following represents the flow of blood from the heart to the body organs and back to the heart? A. Venules to capillaries to veins to arteries B. Arteries to capillaries to veins C. Capillaries to arterioles to veins D. Veins to arteries to capillaries to arterioles

16. Which major vessel brings blood to the right atrium of the heart from the area of the body below the heart? A. The Superior Vena Cava B. The Inferior Vena Cava C. The Pulmonary Trunk D. The Aorta

17. The sac covering the outside of the heart is called the A. Perineurium B. Perimysium C. Pericardium D. Perimytrium

18. The name valve that prevents back flow of blood from the left ventricle to the left atrium. A. Tricuspid B. Bicuspid C. Right Atrioventricular D. Pulmonary Semilunar

19. Blood is pumped into the systemic circulation by the A. Right atrium B. Left atrium C. Right Ventricle D. Left Ventricle

20. Blood is pumped into the pulmonary circulation by the A. Right atrium B. Left atrium C. Right Ventricle D. Left Ventricle