ATI RN
Lymphatic System and Immunity Test Questions Questions
Question 1 of 5
Lymph nodes function as meeting points between antigen-bearing dendritic cells arriving from the tissue and recirculating B and T lymphocytes. Whereas the dendritic cells coming from the tissue enter the lymph node via the afferent lymphatic vessels, the recirculating lymphocytes enter the lymph node:
Correct Answer: C
Rationale: Lymphocytes enter lymph nodes via blood through high endothelial venules ; not lymph , primary organs , or trapping .
Question 2 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 3 of 5
Acquired immunity is a result of previous exposure
Correct Answer: B
Rationale: Acquired immunity develops from prior exposure, such as through vaccination, which stimulates the immune system to remember pathogens.
Question 4 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 5 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.