Immune System – Section 1

6. Which of the following expresses the CD3 surface antigen?

A. Granulocytes
B. T cells
C. Monocytes
D. B cells

Correct Answer: B. T cells

7. Polymorphonuclear leukocytes (or PMNs)

A. can be attracted to the site of infection following activation of complement
B. are derived from bone marrow stem cells
C. are a type of phagocyte that can engulf and kill bacteria
D. all of the above

Correct Answer: D. all of the above

8. Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on

A. chromosome 21 in man, chromosome 6 in mice
B. chromosome 6 in man, chromosome 21 in mice
C. chromosome 17in man, chromosome 6 in mice
D. chromosome 6 in man, chromosome 17 in mice

Correct Answer: D. chromosome 6 in man, chromosome 17 in mice

9. CD8 surface antigen is present in

A. cytotoxic T cells
B. suppressor T cells
C. both (a) and (b)
D. none of these

Correct Answer: C. both (a) and (b)

10. Treatment with bacterial endotoxins results in blast formation in

A. B cells
B. T cells
C. monocytes
D. none of these

Correct Answer: A. B cells

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