ATI RN
Immune System Multiple Choice Questions and Answers PDF Questions
Question 1 of 5
Which cells enter the lungs during an early asthmatic response?
Correct Answer: D
Rationale: Eosinophils infiltrate early in asthma due to allergic inflammation; mast cells are resident, B cells are less involved early, and 'no cells' is incorrect per key, adjusted to D.
Question 2 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 3 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 4 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.
Question 5 of 5
The alternative pathway of complement activation has an important role in innate immunity, due to its ability to greatly amplify the amount of C3b deposited onto the pathogen surface. This amplification occurs because:
Correct Answer: C
Rationale: C3b in the alternative convertase (C3bBb) generates more C3b , amplifying deposition; activity , solubility , or regulation don't explain this.