ATI RN
Lymphatic System Exam Questions Questions
Question 1 of 5
Naive B and T lymphocytes are small, quiescent cells with little cytoplasm and low metabolic activity. Yet within hours after being activated following encounter with their antigen, these cells enlarge and up-regulate many biosynthetic and metabolic pathways. Approximately one day later, the cells begin dividing, and for several days they are the most rapidly dividing cells in the body, undergoing 2-4 rounds of cell division every day. In order to maintain this phenomenal rate of cell division, lymphoblasts must:
Correct Answer: C
Rationale: Lymphoblasts up-regulate glycolysis via glucose transporters/enzymes ; naive cells lack stores , don't engulf lymphocytes , or phagocytose broadly .
Question 2 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 3 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 4 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.
Question 5 of 5
Which part of this figure shows an active plasma B cell?
Correct Answer: C
Rationale: The figure (assumed) shows an active plasma B cell at part C, as per the text, typically depicted as antibody-producing.