Chapter 2. The Cardiovascular System

Multiple Choice Questions


1. The time from the beginning of atrial depolarization to the beginning of ventricular
depolarization is shown on the ECG waveform as the:
A. QRS complex
B. PR interval
C. QT interval
D. ST segment



2. What is recorded on the ECG strip?
A. The electrical activity of the heart
B. The muscle contractions of the heart
C. The circulation of blood in the heart
D. All of the above



3. The average heart is approximately what size?
A. The size of a baseball
B. The size of your fist
C. The size of a peach
D. The size of your foot



4. The outermost layer of the heart is the:
A. Endocardium
B. Myocardium
C. Epicardium
D. Pericardium



5. The middle layer of the heart is the:
A. Endocardium

,B. Myocardium
C. Epicardium
D. Pericardium


6. The innermost layer of the heart is the:
A. Endocardium
B. Myocardium
C. Epicardium
D. Pericardium



7. The sac of tissue that encloses the entire heart is the:
A. Atrium
B. Ventricle
C. Myocardium
D. Pericardium



8. The purpose of the pericardium is to:
A. Protect the heart from infection and trauma
B. Contract the heart
C. Circulate blood through the coronary arteries
D. Keep blood flow headed in the right direction



9. The heart is divided into four chambers. The top chambers are:
A. Right atrium, right ventricle
B. Left atrium, left ventricle
C. Right atrium, left atrium
D. Right ventricle, left ventricle



10. The heart is divided into four chambers. The bottom chambers are:
A. Right atrium, right ventricle
B. Left atrium, left ventricle

,C. Right atrium, left atrium
D. Right ventricle, left ventricle


11. The valve located between the right atrium and right ventricle is the:
A. Mitral (bicuspid) valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonary valve



12. The valve located between the left atrium and left ventricle is the:
A. Mitral (bicuspid) valve
B. Tricuspid valve
C. Aortic valve
D. Pulmonary valve



13. The tricuspid and mitral (bicuspid) valves are known as _____ because they separate
the atria from the ventricles. A. Semilunar valves
B. Pulmonary valves
C. Atrioventricular (AV) valves
D. Aortic valves



14. The _____ valves separate the ventricles from the arteries leading to the lungs or body.
A. Tricuspid
B. Semilunar
C. Mitral (bicuspid)
D. Atrioventricular (AV)



15. Name the two semilunar valves.
A. Pulmonary, mitral
B. Aortic, tricuspid
C. Tricuspid, mitral

, D. Aortic, pulmonary


16. Blood returns to the heart via the veins. The largest vein is the:
A. Vena cava
B. Cava vena
C. Jugular
D. Subclavian



17. Oxygenated blood travels through the heart via the:
A. Pulmonary arteries
B. Peripheral venous system
C. Coronary arteries
D. All of the above



18. The valves located in the heart are important because they:
A. Act like a door
B. Prevent blood from flowing backwards
C. Form electrical conduction through the heart
D. Allow for good blood flow to the body



19. Blood that leaves the right ventricle is considered:
A. Deoxygenated
B. Systemic
C. Peripheral venous return
D. All of the above



20. What are the first vessels to branch off the aorta?
A. Coronary arteries
B. Capillaries
C. Venae cavae
D. Pulmonary arteries