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elsevier - immunology serology questions with correct answers 2024/2025
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elsevier - immunology serology questions with correct answers 2024/2025
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elsevier - immunology serology1. Natural barriers of the immune system include all except which of the following?
a. pH of secretions
b. Coughing
c. Hair follicles
d. Intestinal bacteria - ANSC
2. The fundamental difference between primary and secondary organs of the lymphatic system
is:
a. Antibody production occurs only in the primary lymph organs
b. Complement production occurs only in the primary lymph organs
c. Maturation of lymphocytes occurs in secondaryorgans,andactivationoccursinprimaryorgans
d. Maturation of lymphocytes occurs in primary organs, and activation occurs in secondary
organs - ANSD
3. Toll-like receptors act in which way?
a. Enhancerecognition of bacteria by phagocytic cells
b. Activate B cells to produce antibody
c. Activate helper T cells
d. Aid in processing antigen in the form of an MHC molecule - ANSA
4. Neutrophils and monocytes have receptors for which part of the immunoglobulin molecule?
a. Fc
b. Fab
c. Hinge region
, d. Variable region - ANSA
5. One B-cell marker of early-stage B-cell development is _____, whereas ____ is a marker for
later stages of B-cell development.
a. CD20; CD10
b. CD21; CD10
c. CD10; CD20
d. CD19; CD10 - ANSC
6. A double - positive T cell would express which markers ?
a . CD4 + CD8 + CD3 +
b . CD4 - CD8 + CD3 +
c . CD4 - CD8 - CD3
d . CD4 + CD8 - CD3 + - ANSA
7. Which cell is considered to be a bridge between the innate and adaptive immune systems ?
a . NK cell
b . Mast cell
c . Monocyte - macrophage
d . T cell - ANSA
8 . are involved in cell - mediated immunity , whereas are involved in humoral immunity .
a . T cells ; B cells
b . T cells ; antibodies
c . B cells ; T cells
d . A and B - ANSD
9. Antigens that make very good immunogens include which of the following ?
a . Carbohydrates b . Proteins c . Both a and b d . Neither a or b - ANSB
10. The function of the complement system include ( s ) which of the following ?
a . Clearance of cellular debris b . Chemotaxis c . Lysis of bacteria d . All of the above - ANSD
11. When C3 is cleaved by C3 convertase , what is the result ?
a . C3a is released
b . C3b is used as an opsonin
c . C3b is combined with other complement proteins to form CS convertase
d . All of the above - ANSD
12. Characteristics of cytokines include which of the following ?
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