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y antigen and T-cell signals to proliferate and differentiate into ly secrete Ig

ID: 274385 • Letter: Y

Question

y antigen and T-cell signals to proliferate and differentiate into ly secrete IgG, IgE, or IgA antibody ax Which of the following concemigM the heavy chains of the IgM and lgD have different amino acid hetrxpression on a B cell is incorrect A) and T-ce cells, the cell can B Ifthe B cell is triggered The light a The IgM chains of the lgM and IgD have identical amino acid sequences. The leM and IgD have different antigenic specificities. 21 The primary and secondary antibody responses differ in A) the speed at which antibodies appear in the serum. B the predominant isotype generated. O the biologic functions manifested by the Ig isotypes produced to anti E) All of the above. main benefit of the recirculation of nalve lymphocytes is #A) For the innate immune system. B) For B but not T ly C) For both B and Tlymphocytes. D) For T but not B lymphocytes. 2 The most iprtant component of fymph entering a lymph node, specific to lymph node defense function, is A) Antibody B) Memory lymphocytes c) Antigen D) Naive lymphocytes 24. Superantigens A) May cause food poisoning. B) May cause blindness. C May cause hepatitis. D) May cause "septic shock". 25. Which of the following is correct? NK cells kill their target cells by phagocytosis and intracellular digestion NK cells are a subset of polymorphonuclear cells A) B) CO) NK-cell killing is extracellular. D) NK cells proliferate in response to antigen.

Explanation / Answer

22. The main benefit of recirculation of naive lymphocytes is innate immune system response.

23. Naive lymphocytes

24. Super antigens causes septic shock

25. Nk cells are subset of polymorphonuclear cells.