ATI RN
Immune System Questions Questions
Question 1 of 5
Regarding the proportion of circulating lymphocytes
Correct Answer: B
Rationale: T cells are 60-70% ; B cells are 10-20% , neutrophils are not lymphocytes , and plasma cells are rare .
Question 2 of 5
Early development of the immune system results in non-responsiveness to our own self proteins thereby abrogating the initiation of autoimmune disease. However, this is not always absolute and a secondary mechanism may be needed. This type of tolerance is called:
Correct Answer: C
Rationale: Peripheral tolerance is secondary; central is early, surveillance is monitoring, and immunodeficiency is loss.
Question 3 of 5
Which of the following is NOT a lymphoid organ?
Correct Answer: C
Rationale: The pancreas is digestive/endocrine, not lymphoid; spleen , thymus , and lymph nodes are lymphoid.
Question 4 of 5
The spleen's role in immunity primarily involves:
Correct Answer: B
Rationale: The spleen filters blood for pathogens; T cells mature in thymus , lymph is from nodes, and fluid isn't stored.
Question 5 of 5
Which lymphatic structure is found in the mediastinum?
Correct Answer: B
Rationale: The thymus is in the mediastinum; spleen is abdominal, tonsils are throat, appendix is gut.