1. Earlham High School
Anatomy Class
Cardiovascular
System

2. The main organ of the cardiovascular system is the:#1
The main organ of the cardiovascular system is the: A:
Lungs B:
Heart C:
Liver D:
Your mom!

3. B: Heart

4. Which of the following structures consists of self-exciting tissue?#2
Which of the following structures consists
of self-exciting tissue? A:
chordae tendineae B:
papillary muscles C:
sinoatrial node D:
atrial syncytium

5. C: sinoatrial node

6. Platelets are best defined as#3
Platelets are best defined as A:
Giant, multinucleated cells B:
Cytoplasmic fragments of cells C:
Immature leukocytes D:
Lymphoid cells

7. B: cytoplasmic fragments of cells

8. The tissue that forms a loose-fitting sac#4
The tissue that forms a loose-fitting sac
Around the heart is the A:
pericardium B:
epicardium C:
endocardium D:
exocardium

9. A: pericardium

10. Nonprotein nitrogenous substances include#5
Nonprotein nitrogenous substances include A:
Amino acids B:
Urea C:
Uric acid D:
All of the above

11. D: All of the above

12. Of the following, the one that is not a type#6
Of the following, the one that is not a type
of plasma protein: A:
Heparins B:
Fibrinogens C:
Albumins D:
Globulins

13. A: Heparins

14. Of the following, the one that is not a factor #7
Of the following, the one that is not a factor
that influences blood pressure: A:
Blood volume B:
Viscosity C:
Digestive rate D:
Stroke volume

15. C: Digestive rate

16. A normal white blood cell count (WBCC) is between#8
A normal white blood cell count (WBCC) is between A:
/mm3 of blood B:
,000/mm3 of blood C:
50, ,000/mm3 of blood D:
15,000-25,000/mm3 of blood

17. B: ,000/mm3 of blood

18. The basic event in the formation of a blood clot#9
The basic event in the formation of a blood clot
is the change of A:
Fibrinogen to fibrin B:
Fibrin to fibrinogen C:
Thrombin to prothrombin D:
Vitamin K to prothrombin

19. A: Fibrinogen to fibrin

20. The most important action of plasma albumin is
#10
The most important action of plasma albumin is A:
Acting as antibodies of immunity B:
Helping to control bleeding C:
Serving as energy sources D:
Helping to maintain blood osmotic pressure

21. D: Helping to maintain blood osmotic pressure

22. When the ventricular walls contract, the
#11
When the ventricular walls contract, the
Bicuspid valve opens and the tricuspid valve closes
Tricuspid valve opens and the bicuspid valve closes A: B: C:
Bicuspid and tricuspid valves close D:
Bicuspid and tricuspid valves open

23. C: Bicuspid and tricuspid valves close

24. The most active phagocytic cells among the
#12
The most active phagocytic cells among the
leukocytes are A:
Basophils and eosinophils B:
Neutrophils and monocytes C:
Lymphocytes and neutrophils D:
Monocytes and lymphocytes

25. B: Neutrophils and monocytes

26. The density of capillaries within a tissue varies
#13
The density of capillaries within a tissue varies
directly with the tissue’s A:
Thickness B:
Fluid content C:
Type of matrix D:
Rate of metabolism

27. D: Rate of metabolism

28. In an ECG pattern, the T wave is caused by
#14
In an ECG pattern, the T wave is caused by
Polarization of ventricular muscle fibers A:
Polarization of atrial muscle fibers B:
Depolarization of ventricular muscle fibers C:
Depolarization of atrial muscle fibers D:

29. B: Polarization of ventricular muscle fibers

30. In an ECG pattern, the P wave is caused by
#15
In an ECG pattern, the P wave is caused by
Polarization of ventricular muscle fibers A:
Polarization of atrial muscle fibers B:
Depolarization of ventricular muscle fibers C:
Depolarization of atrial muscle fibers D:

31. C: Depolarization of atrial muscle fibers

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