1. The most abundant type of leukocyte in a normal individual is the
A. plasma cell
B. lymphocyte
C. basophil
D. neutrophil

2. Atrial contraction of the heart is referred to as
A. atrial systole
B. atrial diastole
C. end-diastolic volume
D. atrial flexion

3. The intrinsic clotting system is initiated by
A. secretion of tissue thromboplastin
B. contact of a clotting factor with negatively surfaces such as connective
tissue or glass
C. conversion of prothrombin to thrombin
D. conversion of fibrinogen to fibrin

4. The ECG wave produced during atrial depolarization is the
A. P wave
B. QRS wave
C. T wave
D. U wave

5. Closing of the AV valves produces
A. the first heart sound (lub)
B. the second heart sound (dub)
C. both the first and second heart sounds
D. None of these choices is true

6. The normal pacemaker of the heart is the
A. Purkinje fibers
B. bundle of His
C. AV node
D. SA node

7. Which of the following is not a distinct ECG wave produced during each normal cardiac
cycle?
A. T wave
B. QRS wave
C. P wave
D. OPS wave

8. The platelet plug is strengthened by a meshwork of insoluble protein fibers called
A. albumin
B. serum
C. elastin
D. fibrin

9. Each hemoglobin contains an iron-containing pigment called a
A. ferrin
B. globin
C. heme
D. globulin

10. The second sound of the heart is produced by
A. turbulent flow of blood in arteries
B. closing of the semilunar valves
C. closing of the AV valves
D. electrical activity in the Purkinje fibers