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Test Bank for Clinical Immunology and Serology a Laboratory Perspective 4th Edition By Christine Dorresteyn Stevens Linda E miller Chapter 124 Latest Guide $12.49   Add to cart

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Test Bank for Clinical Immunology and Serology a Laboratory Perspective 4th Edition By Christine Dorresteyn Stevens Linda E miller Chapter 124 Latest Guide

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Test Bank for Clinical Immunology and Serology a Laboratory Perspective 4th Edition By Christine Dorresteyn Stevens Linda E. miller Chapter 1-24 Latest Guide The germinal centers found in the cortical region of lymph nodes and the peripheral region of splenic periarteriolar lymphatic tissue: Ba...

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  • April 2, 2024
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Test Bank for Clinical Immunology and Serology
a Laboratory Perspective 4th Edition By Christine
Dorresteyn Stevens Linda E. miller Chapter 1-24
Latest Guide

1). The germinal centers found in the cortical region of lymph nodes and the peripheral region
of splenic periarteriolar lymphatic tissue:

 Ans: contains large populations of B lymphocytes and plasma cells


2). Balance between th1 and th2 cell activation determines outcome of intracellular
infections. thus, in case of mycobacterium leprae infection:

 Ans: tuberculoid leprosy will occur in patients with a prominent TH1 response


3). The initiation of t cell responses requires multiple receptors on the t cells recognizing
ligands on apcs. the mhc molecule located around the peptide-binding cleft is recognized
by the:

 Ans: CD4 or CD8 molecules


4). The edema occurring in the inflammatory process is the result of all the following factors
except:

 Ans: neural impulse by the sympathetic system and vasoconstriction


5). Toll-like receptors (tlr):

 Ans: recognize pathogen-associated molecular patterns (PAMPs) on selective
microorganisms


6). The initiation of t cell responses requires multiple receptors on the t cells recognizing
ligands on apcs. the t cell receptor transduction molecule(s) is(are) conducted by:

 Ans: CD3 and ζ molecules



Which of the following is considered a primary lymphoid organ?


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, 7).
 Ans: thymus


8). Immediate activation of the b lymphocytes following contact with the antigen involves all
of the following molecules except:

 Ans: MHC class II molecules


9). Immunologic memory refers to:

 Ans: changes in adaptive immune responses with subsequent encounters with
antigen


10). Both, naive mature effector t lymphocytes migrate differently in their lives. naive t cells
express which adhesion molecule to mediate their migration into lymph nodes through
specialized vessels called high endothelial venues (hevs)?

 Ans: L-selectin


11). The main consequences of complement activation are all of the following except:

 Ans: producing 2nd signal for macrophage activation


12). 'langerhans cells' which play a role in the immune system are:

 Ans: dendritic cells located mainly in the epidermis


13). All of the following cells results in the germinal center reaction of the follicles (b
lymphocyte zone) except:

 Ans: short-lived plasma cells


14). The antigen recognition on the t cells is mediated by:

 Ans: the Variable (v) regions of α and β chains


15). The t-cell receptor:

 Ans: recognizes antigen fragments via the α and β chains



According to the clonal selection hypothesis, which of the following is correct?


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, 16).
 Ans: Clones of lymphocytes specific for antigens develop prior to exposure to the
antigens


17). Which of the following best describes the t-dependent antibody response?

 Ans: IT is the response of follicular B lymphocytes to a protein antigen and
characterized by isotope-switched, high affinity antibodies; memory B cells, long lived
plasma cells


18). Mhc class ii molecules contain:

 Ans: One α chain and one β chain


19). The inflammatory cytokines will cause langerhans cells in the epidermis to perform all of
the following except:

 Ans: antigen presentation to the T cells in the follicles of the lymph nodes


20). The phases and order of the specific or acquired immune responses are:

 Ans: recognition phase; activation phase; effector phase; homeostasis phase;
memory phase


21). A naive cd4+ t cell may differentiate into subsets that produce different cytokines that
recruit and activate different cell types. the ifn-γ is produced mainly by:

 Ans: CD4+ T cell TH1 subset


22). Th1 subset effector cells that aid in cell mediated immune response activate the
macrophage and b lymphocytes by:

 Ans: CD40L-CD40 interaction and IFN-γ


23). The diversity of antigen receptors produced by the use of different combinations of v, d,
and j gene segments in different clones of lymphocytes is the result of:

 Ans: both combinatorial diversity and junctional diversity


24). All of the following statements about the b-cell antigen receptor are true except:




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