AAB MT IMMUNOLOGY EXAM
QUESTIONS WITH COMPLETE
ANSWERS
Which one of the following is not an external defense mechanism of natural immunity
that provides the human body with a defense against invading microorganisms?
A. skin
B. mucus
C. body fluids
D. bursa of Fabricius - Answer-D. bursa of Fabricius
Having an elevated temperature during an infection is an example of what type of
immunity?
A. innate immunity
B. specific immunity
C. humoral immunity
D. cell-mediated immunity - Answer-A. Innate immunity
Which defense mechanism involves engulfing foreign particles?
A. opsonization
B. immunization
C. phagocytosis
D. pinocytosis
A.
B.
C.
D. - Answer-C. Phagocytosis
Which one plays an important role in making bacteria susceptible to osmotic lysis?
A. properdin
B. lysozyme
C. interferon
D. chemotactic factors - Answer-B. Lysozyme
Which one of the following is responsible for the nonspecific killing of tumor cells?
A. natural killer cells
B. cytotoxic T cells
,C. helper T cells
D. complement - Answer-A. Natural killer cells
Which one of the following is capable of eliciting an immune response?
A. hapten
B. epitope
C. adjuvant
D. immunogen - Answer-D. Immunogen
Receiving a vaccination is an example of which type of immunity?
A. natural active immunity
B. natural passive immunity
C. artificial active immunity
D. artificial passive immunity - Answer-C. Artificial active immunity
Which immune response is mediated by antibodies?
A. innate immunity
B. natural immunity
C. cellular immunity
D. humoral immunity - Answer-D. Humoral immunity
Which one of the following is considered to be a primary lymphoid organ?
A. spleen
B. tonsils
C. thymus
D. lymph nodes - Answer-C. Thymus
Which organs or systems are capable of responding to circulating antigens with the
production of specific lymphocytes and plasma cells?
A. pancreas and bursa of Fabricius
B. lymph nodes and spleen
C. thymus and biliary tract
D. heart and bone marrow - Answer-B. Lymph nodes and spleen
Where are B lymphocytes and T lymphocytes produced?
A. thymus
B. thyroid
C. bone marrow
D. bursa of Fabricius - Answer-C. Bone marrow
,Which of the following cells are thymus-dependent?
A. T cells
B. B cells
C. plasma cells
D. macrophages - Answer-A. T cells
Where does the differentiation of T cells occur?
A. thyroid
B. thymus
C. bone marrow
D. bursa of Fabricius - Answer-B. Thymus
T cells are involved with which of the following?
A. humoral immunity
B. anaphylactic shock
C. antibody production
D. cell-mediated immunity - Answer-D. cell-mediated immunity
How can cell-mediated immunity be transferred to a normal individual?
A. with lymphoid cells from a hypersensitive individual
B. with polymorphonuclear cells from a normal person
C. with specific liver cells from an infected individual
D. with transfer of monocytes from a normal person - Answer-A. With lymphoid cells
from a hypersensitive individual
What is the main function of T-helper cells?
A. kill tumor cells
B. produce immunoglobulins
C. attack virally infected cells
D. assist B cells in producing antibodies - Answer-D. Assist B cells in producing
antibodies
The production of antibodies is turned off by which cells?
A. suppressor T cells
B. cytotoxic T cells
C. helper T cells
D. plasma cells - Answer-A. Suppressor T cells
What are small polypeptides given off by T cells, which regulate the function of
phagocytic cells called?
, A. clusters of differentiation
B. memory cells
C. lymphokines
D. haptens - Answer-C. Lymphokines
Which T cells acts specifically to kill tumor cells and virally infected cells?
A. suppressor T cells
B. cytotoxic T cells
C. helper T cells
D. NK cells - Answer-B. Cytotoxic T cells
All of the following are surface markers for T cells Except which one?
A. CD2
B. CD4
C. CD8
D. CD16 - Answer-D. CD16
Lymphoid stem cells that differentiate in the bone marrow are called what?
A. T cells
B. B cells
C. NK cells
D. LAK cells - Answer-B. B cells
Which one of the following is associated with the humoral immune response?
A. macrophage activity
B. suppressor T cells
C. lymphokines
D. plasma cells - Answer-D. Plasma cells
Which cells are identified by the presence of surface immunoglobulin receptor?
A. T cells
B. B cells
C. NK cells
D. LAK cells - Answer-B. B cells
Which B lymphocytes transform into cells that produce antibody molecules?
A. plasma cells
B. memory cells
C. myeloma cells
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