ATI RN
Lymphatic System and Immunity Test Questions Questions
Question 1 of 5
Natural killer cells assess whether other cells are abnormal by detecting types and levels of surface-associated
Correct Answer: A
Rationale: MHC class I molecules are self-identification molecules found on all nucleated host cells. Natural killer cells, after making contact with cells expressing stress signals, make the decision whether to kill them or not by assessing whether they express the appropriate types and levels of MHC I molecules. Although they are members of the innate immune system, natural killer cells do not recognize nonself, pathogen-associated molecular patterns, or pattern recognition receptors. Natural killer cells are unable to recognize somatically generated cell surface receptors.
Question 2 of 5
Which of the following statements are correct?
Correct Answer: B
Rationale: Macrophages derive from monocytes and reside in tissues as phagocytic cells, not granulocytes.
Question 3 of 5
Helper T cells and inducer T cells are also called ___________ cells because of the coreceptor they both have.
Correct Answer: A
Rationale: Helper and inducer T cells are CD4+ ; CD8+ are cytotoxic.
Question 4 of 5
MHC II molecules present
Correct Answer: B
Rationale: MHC II presents phagolysosomal antigens; proteasomes are MHC I.
Question 5 of 5
The structure of a lymphatic vessel is most similar to that of
Correct Answer: C
Rationale: Lymphatic vessels resemble veins with thin walls and valves, unlike arteries or capillaries.