ATI RN
Questions on Immune System Questions
Question 1 of 5
where do T-lymphocytes acquire their immunocompetence?
Correct Answer: A
Rationale: T-lymphocytes gain immunocompetence in the thymus.
Question 2 of 5
What are type I interferons and how are they produced?
Correct Answer: C
Rationale: Type I interferons inhibit viral replication and are made by plasmacytoid DCs (pDCs) via TLR7/9 ; not neutrophils , macrophages , or NK cells .
Question 3 of 5
What is the contribution of Th cells in T cell activation?
Correct Answer: B
Rationale: Th cells secrete IL-2 to boost CTL proliferation and memory ; killing is CTL's role, adhesion and MHC recognition are broader.
Question 4 of 5
What is the function of IgA in the intestine?
Correct Answer: C
Rationale: IgA binds microbes to block adhesion ; it doesn't inflame , produce cytokines , or SCFAs .
Question 5 of 5
Which is not a property of the red pulp within the spleen?
Correct Answer: A
Rationale: Red pulp filters blood with erythrocytes and macrophages , not lymph ; erythrocyte production is fetal, not adult.