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Immune System NCLEX Questions Quizlet Questions
Question 1 of 5
Thymus dependent zone in the lymph node & spleen are & respectively:
Correct Answer: D
Rationale: Thymus-dependent zones are paracortex (lymph node) and PALS (spleen) .
Question 2 of 5
Which type of APC has the ability to concentrate antigen for presentation?
Correct Answer: A
Rationale: Dendritic cells excel at antigen uptake and concentration; macrophages and B cells (C, D) present but don't concentrate as effectively.
Question 3 of 5
How do cytotoxic T cells (CTLs) kill infected cells?
Correct Answer: C
Rationale: CTLs use perforin, granzyme B, and FasL to trigger apoptosis ; antibodies are B-cell products, cytokines are secondary.
Question 4 of 5
What is the role of the thymus in protecting the body against disease?
Correct Answer: B
Rationale: The thymus matures T lymphocytes and produces thymosin ; it doesn't recycle , mature B cells (C, bone marrow), or produce macrophages/monocytes .
Question 5 of 5
When macrophages in a tissue encounter bacteria, they release cytokines that induce an inflammatory response. These cytokines act on other immune cells, to recruit them to the site of infection and to enhance their activities. In addition, these cytokines act on the endothelial cells of the blood vessel wall to:
Correct Answer: A
Rationale: Cytokines increase endothelial permeability for immune cell extravasation; tightening junctions , proliferation , or microbicidal action aren't primary effects.