ATI RN
Lymphatic System Exam Questions Questions
Question 1 of 5
Vaccines generally confer what type of immunity?
Correct Answer: B
Rationale: Vaccines stimulate active immunity artificially ; passive (A, C) involves antibody transfer, natural active is from infection.
Question 2 of 5
Immunodeficiency diseases occur when individuals have defects in leukocyte adhesion to inflamed endothelial cells, thereby impeding the extravasation of phagocytes into infected tissues. When neutrophils from one class of these patients were isolated and tested using in vitro assays for neutrophil-endothelial cell interactions and extravasation, it was found that the neutrophils could slowly roll along the endothelial vessel wall but were unable to arrest and migrate across the endothelium. The most likely protein deficient in these neutrophils is:
Correct Answer: D
Rationale: Integrins mediate neutrophil arrest; rolling (selectins, B/C) occurs, but without integrins, migration fails; ICAMs are on endothelium.
Question 3 of 5
The adaptive immune system uses multiple strategies to generate diversity in our ability to mount responses to a wide array of infectious microorganisms. These strategies include the generation of diverse repertoires of B-cell and T-cell antigen receptors, as well as polymorphism of MHC genes. The polymorphism of MHC genes differs from the diversity of lymphocyte antigen receptors in that:
Correct Answer: D
Rationale: MHC polymorphism varies between individuals ; receptor diversity is clonal within one (A, B, C are incorrect).
Question 4 of 5
The way in which some organism supplies some other organism with food and energy known as
Correct Answer: A
Rationale: Food chains describe the linear transfer of energy and nutrients from one organism to another in an ecosystem.
Question 5 of 5
Clonal selection
Correct Answer: C
Rationale: Clonal selection is the antigen-driven proliferation of specific B and T cells, not involving NK cells, leukocytes, or complement.