PAL Histology Lymphatic System Lab Practical Question 1 · NurseQuizzes

NurseQuizzesPAL Histology Lymphatic System Lab Practical Question 1

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ATI LPN · PAL Histology Lymphatic System Lab Practical Question 1

Question 1 of 46

Which cells in the thymus examine T cells for MHC restriction and tolerance of self during positive selection?

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ATI LPN · PAL Histology Lymphatic System Lab Practical Question 1

Question 15 of 46

An infant with recurrent bacterial and fungal infections is suspected to have an immunodeficiency disease. Within two days after exposure to a pathogen, the organisms have proliferated to dangerous levels requiring immediate systemic antibiotic treatment. It is unlikely that this infant has a defect in B or T lymphocyte responses to the infection because:

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ATI LPN · PAL Histology Lymphatic System Lab Practical Question 1

Question 17 of 46

Some viruses have mechanisms to down-regulate MHC class I protein expression on the surface of cells in which the virus is replicating. This immune evasion strategy might prevent effector CD8 cytotoxic T cells from recognizing and killing the virus-infected cells. Would this immune evasion strategy also prevent the initial activation of virus-specific CD8 T cells?

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