Verified Q&A | A+ Guide 2026/2027
The germinal centers found in the cortical region of lymph nodes and the
peripheral region of splenic periarteriolar lymphatic tissue
A) support the development of immature B and T cells.
B) function in the removal of damaged erythrocytes from the circulation.
C) act as the major source of stem cells and thus help to maintain hematopoiesis.
D) provide an infrastructure that on antigenic stimulation contains large
populations of B lymphocytes and plasma cells.
E) are the sites of NK-cell differentiation. - Answer-D
Which of the following generally does not apply to bone marrow (a primary
lymphoid organ) and secondary lymphoid organs?
A) cellular proliferation
B) differentiation of lymphocytes
C) cellular interaction
D) antigen-dependent response
E) None of the above. - Answer-D
Which of the following apply uniquely to secondary lymphoid organs?
,A) presence of precursor B and T cells
B) circulation of lymphocytes
C) terminal differentiation
D) cellular proliferation
E) All of the above. - Answer-C
Which of the following does not apply to "innate" immune mechanisms?
A) absence of specificity
B) activation by a stimulus
C) involvement of multiple cell types
D) a memory component - Answer-D
Which of the following is the major function of the lymphoid system?
A) innate immunity
B) inflammation
C) phagocytosis
D) acquired immunity
E) None of the above. - Answer-D
Removal of the bursa of Fabricius from a chicken results in
, A) a markedly decreased number of circulating T lymphocytes.
B) anemia.
C) delayed rejection of skin graft.
D) low serum levels of antibodies in serum.
E) all of the above.
F) none of the above. - Answer-D
Which of the following is correct?
A) NK cells proliferate in response to antigen.
B) NK cells kill their target cells by phagocytosis and intracellular digestion.
C) NK cells are a subset of polymorphonuclear cells.
D) NK-cell killing is extracellular.
E) NK cells are particularly effective against certain bacteria. - Answer-D
A large glycoprotein has been enzymatically digested in the laboratory to yield a
mixture of glycopeptides ranging in size from 4 to 6 amino acids in length. Which
of the following would be expected if the peptide mixture were administered to
an exerimental animal together with an adjuvant such as complete Freund's
adjuvant?
A) peptide-specific antibodies would be generated using the peptide mixture
alone