ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
The blood thymic barrier is achieved by the following:
Correct Answer: C
Rationale: Blood-thymic barrier includes a perivascular space with macrophages ; endothelium is continuous , basement membrane thick , no plasma cells .
Question 2 of 5
Which of the following is not a function of dendritic cells?
Correct Answer: C
Rationale: Dendritic cells activate T cells , recognize patterns , and collect antigens ; killing is more NK/CTL-specific.
Question 3 of 5
What is delayed-type hypersensitivity (DTH)?
Correct Answer: A
Rationale: DTH involves memory Th1 cells reacting to a second exposure ; it's not immediate or non-specific .
Question 4 of 5
Lymphatic capillaries are able to receive cellular debris and foreign particles because
Correct Answer: A
Rationale: Flaplike valves (overlapping endothelial cells) in lymphatic capillaries allow debris entry; pressure , dual design , and amoeboid motion don't explain this.
Question 5 of 5
Adaptive immune responses are slow to develop, taking days to weeks after exposure to reach their peak. However, these responses are more specific than innate responses, and also generate immunological memory. These latter features, which provide enhanced protection upon re-infection with the same pathogen, are the basis of:
Correct Answer: A
Rationale: Vaccines exploit specificity and memory of adaptive immunity; antibiotics target bacteria, shock is a reaction, complement is innate.