ATI RN
Lymphatic System and Immunity Test Questions Questions
Question 1 of 5
The mechanism of cross-presentation by dendritic cells is an essential pathway for generating CD8 T cell responses to some intracellular pathogens. If this pathway did not exist, we would be highly susceptible to:
Correct Answer: C
Rationale: Cross-presentation targets pathogens not infecting DCs ; macrophages , evasion , or fusion are less specific.
Question 2 of 5
The adaptive immune system is capable of mounting specific responses to particular microorganisms because
Correct Answer: C
Rationale: Adaptive immunity relies on a vast lymphocyte repertoire, each specific to a unique antigen, not changing specificity or stem cell-driven receptors.
Question 3 of 5
What type of immune response is always disadvantageous to a person?
Correct Answer: C
Rationale: Autoimmune responses harm self-tissues, unlike inflammatory, humoral, or complement responses, which are typically beneficial.
Question 4 of 5
Leukocyte secreted cytokines, which act on leukocytes, are known as.
Correct Answer: D
Rationale: Interleukins are cytokines acting between leukocytes, a broad term encompassing lymphokines (lymphocyte-derived) and others.
Question 5 of 5
Complete the following sentence. The antibody isotype which displays the highest avidity due to its pentameric form, and is capable of complement recruitment corresponds to.....
Correct Answer: D
Rationale: IgM's pentameric structure gives high avidity and activates complement efficiently.