Biology 242 – Lecture
Chapter 20 (Cardiovascular System: The Heart)
Practice Quiz
I. Arrange the answers in correct sequence:
_____ _____ _____ _____ 1. Heart’s conduction system pathway:
C. AV bundle and bundle branches
A. AV node
D. SA node
B. Purkinje fibers
____ ____ ____ ____ ____ 2. Route of blood now in the right atrium: A. Left atrium B. Left ventricle
C. Right ventricle D. Pulmonary trunk E. Pulmonary vein F. Bicuspid valve
____ ____ ____ ____ ____ G. Lung H. Pulmonary SL valve I. Pulmonary artery J. Tricuspid valve
II. Circle the letter preceding the one best answer to each question:
3. All of the following are correctly matched except:
A. Myocardium – heart muscle B. Visceral pericardium – epicardium C. Endocardium – forms heart valves
D. Pericardial cavity – space between fibrous pericardium and parietal layer of serous pericardium
4. Which of the following factors tends to decrease heart rate?
A. Release of the transmitter substance norepinephrine in the heart.
B. Activation of neurons in the cardioacceleratory center
C. Increase of vagal nerve impulses
D. Increase of sympathetic nerve impulses.
5. The average cardiac output for a resting adult is about_______per minute.
A. 1 quart
B. 5 pints
C. 1.25 gallons (5 liters)
D. 0.5 liter
6. When ventricular pressure exceeds atrial pressure, what event occurs?
A. AV valves open B. AV valves close C. Semilunar valves open
E. 2000 mL
D. Semilunar valves close
7. All of the following are normal in fetal circulation except:
A. Open foramen ovale in the interatrial septum B. Functional ductus arteriosus
C. Functional ductus venosus D. Aorta emerging from both ventricles E. One umbilical vein
III. Circle T (True) or F (False). If the statement is false, cross out the word(s) that make it false
and write in an appropriate correction so that the statement now becomes a true statement.
T F 8. The blood in the left chambers of the heart contains higher oxygen content than blood in the right
chambers.
T F 9. The pulmonary artery carries blood from the lungs to the left atrium.
T F 10. The normal cardiac cycle does not require direct stimulation by the autonomic nervous system.
Biology 250 – Lecture
Chapter 20 Practice Quiz
Page Two
IV. Using the blanks provided, fill-in the word or phrase that best fits the description given:
_____________________________11. A defect in the interventricular septum would permit blood to flow
directly between these two chambers.
_____________________________12. This is a more commonly used term for a myocardial infarction.
_____________________________13. An ECG is a recording of this; NOT the mechanical contractions.
_____________________________14. This term means abnormality or irregularity of heart rhythm
_____________________________15. This is what produces the second heart sound (the “dupp”).
_____________________________16. This term means abnormality or irregular sounds heard while
performing auscultation of the heart
_____________________________17. These are the two terms used for “too rapid” a heart rate ( ˃ 100/min)
_____________________________
and “too slow” a heart rate (˂ 50 /min)