ATI RN
Immune System Quiz Questions Questions
Question 1 of 5
Which immunoglobulin crosses the placenta?
Correct Answer: D
Rationale: IgG crosses the placenta; IgA is in secretions, IgD is on B cells, IgE is for allergies.
Question 2 of 5
Which cells undergo positive selection in the thymus?
Correct Answer: B
Rationale: T cells undergo positive selection; B cells are in marrow, macrophages and neutrophils don't.
Question 3 of 5
Which immunoglobulin is first produced in neonates?
Correct Answer: C
Rationale: IgE is minimal at birth; IgM is first, but among these, IgG from mother is present, corrected to IgM in context.
Question 4 of 5
With regard to the medullary sinuses of the lymph node: They are supplied by the paratrabecular sinuses.
Correct Answer: A
Rationale: Lymph flows from paratrabecular (trabecular) sinuses into medullary sinuses in the lymph node.
Question 5 of 5
Identify the structure indicated by an arrow. Classify the tissue composing the structure.
Correct Answer: A
Rationale: The arrow indicates a trabeculum, made of dense irregular connective tissue, providing structural support.