[Immunology] The Lymphoid System Quizzes (14 questions)

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[Immunology] The Lymphoid System Quizzes (14 questions)
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Select the one best response to each question!

Where are all undifferentiated lymphocytes made?

1. Which of the following is a primary lymphoid organ?
a. Lymph node
b. Spleen
c. Thymus
2. What type of cells would be found in a primary follicle?
a. Unstimulated B cells
b. Germinal centers
c. Plasma cells
d. Memory cells
3. Which of the following is true of NK cells?
a. They rely on memory for antigen recognition.
b. They share antigens with B cells.
c. They are found mainly in lymph nodes.
d. They recognize a lack of MHC proteins.
4. Where are all undifferentiated lymphocytes made?
a. Bone marrow
b. Thymus
c. Spleen
d. Lymph nodes
5. In the thymus, positive selection of immature T cells is
based upon recognition of which of the following?
a. Self-antigens
b. Stress proteins
c. MHC antigens
d. μ chains
6. Which of these are found on a mature B cell?
a. IgG and IgD
b. IgM and IgD
c. Alpha and beta chains
d. CD3
7. Which receptor on T cells is responsible for rosetting with sheep red blood cells?
a. CD2
b. CD3
c. CD4
d. CD8
8. Which of the following can be attributed to antigenstimulated T cells?
a. Humoral response
b. Plasma cells
c. Cytokines
d. Antibody
9. Which is a distinguishing feature of a pre-B cell?
a. μ chains in the cytoplasm
b. Complete IgM on the surface
c. Presence of CD21 antigen
d. Presence of CD25 antigen
10. When does genetic rearrangement for coding of light chains take place?
a. Before the pre-B cell stage
b. As the cell becomes an immature B cell
c. Not until the cell becomes a mature B cell
d. When the B cell becomes a plasma cell
11. Which of the following antigens are found on the T cell subset known as helper/inducers?
a. CD3
b CD4
c. CD8
d. CD11
12. Where does the major portion of antibody production occur?
a. Peripheral blood
b. Bone marrow
c. Thymus
d. Lymph nodes
13. Which of the following would represent a doublenegative thymocyte?
a. CD2–CD3CD4–CD8
b. CD2CD3–CD4–CD8–
c. CD2–CD3CD4CD8–
d. CD2CD3CD4CD8–
14. Which of the following best describes the T-cell receptor for antigen?
a. It consists of IgM and IgD molecules.
b. It is the same for all T cells.
c. It is present in the double-negative stage.
d. Alpha and beta chains are unique for each antigen.


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