ATI RN
Immune System Exam Questions Questions
Question 1 of 5
Which immunoglobulin is most abundant in blood?
Correct Answer: D
Rationale: IgG is the most abundant in blood; IgA is in secretions, IgD is on B cells, IgE is for allergies.
Question 2 of 5
Which cells are elevated in parasitic infections?
Correct Answer: C
Rationale: Eosinophils rise in parasitic infections; neutrophils fight bacteria, lymphocytes are adaptive, macrophages are broad.
Question 3 of 5
Which cytokine promotes B cell differentiation?
Correct Answer: B
Rationale: IL-4 aids B cell differentiation; IL-2 boosts T cells, IL-6 supports, TNF-alpha inflames.
Question 4 of 5
Which cells are elevated in viral infections?
Correct Answer: B
Rationale: Lymphocytes rise in viral infections; neutrophils are bacterial, eosinophils are parasites, basophils are allergies.
Question 5 of 5
Describe the histological structure and function of the thymus (ANAT2020 only).
Correct Answer: A
Rationale: The thymus is a primary lymphoid organ where T-cells mature through antigen-independent differentiation . It has a connective tissue capsule with trabeculae forming lobules , a cortex with densely packed thymocytes, and a medulla with Hassall's corpuscles (C, D), supported by epithelioreticular cells.