Which of the following is true about IgA isotype (class) switching in GALT? a. M
ID: 302527 • Letter: W
Question
Which of the following is true about IgA isotype (class) switching in GALT? a. Molecules that induce IgA class switching consist exclusively b. IgA class switching in the gut can occur by T-dependent and T-independent mechanisms c. Molecules that induce igA class switching consist exclusively of soluble meditators d. There is no lgA isotype switching in the GALT 57. of membrane bound proteins 8. The various tissues/organs, which have evolved to be protected, to a variable degree, from immune responses, are called: a. Organ systems b. Regional immune systems Immunoproviledge sites Unresponsive or anergic tissues e. d. 59. Transplantation of cells or tissues from one individual to a genetically non-identical individual invariably leads to: Surgical failure of the graft Long-life tolerance to the graft Immune-mediated rejection of the graft Necrosis of the grafted tissue a. C. d. b. 60. If cells from two MHC-disparate individuals are mixed, each can react against the other and both will proliferate, thus resulting in a. a mixed lymphocyte reaction or 'MLR b. a one-way MLR e. a two-way MLR d. a suppressor assayExplanation / Answer
Answere :
Question 57 : The option (b) is correct i.e. IgA class switching in the gut can occur by T-dependent and T-independent mechanisms. The dominance of IgA production by intestinal plasma cells is due in parts to selective induction of IgA isotype switching In B cells in GALT.
Question 58 : The correct option is (c) i.e immunoprivelage site are such tissues, which evolved to be protected, to a variable degree, from immune response.
Question 59 : The correct option is (c) i.e. immune-mediated rejection of graft occur when transplantion of cells from one individual to a genotgpically non-identical individual done.
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