ATI RN
Pediatric Immunization Practice Questions Questions
Question 1 of 5
Which of the following are lineage restricted, morphologically identifiable, and express differentiation markers?
Correct Answer: C
Rationale: Mature cells are fully differentiated, lineage-restricted, and express specific markers.
Question 2 of 5
Paracortex
Correct Answer: B
Rationale: The paracortex is rich in T cells, especially CD4+.
Question 3 of 5
Lymphocyte passage (diapedesis or transmigration) occurs at the between adjacent endothelial cells then into the tissues.
Correct Answer: C
Rationale: Diapedesis occurs at adherens junctions between endothelial cells.
Question 4 of 5
Allelic exclusion creates monospecific B-cell receptors (BCRs). The result is these cells each secrete:
Correct Answer: D
Rationale: Allelic exclusion ensures each B cell produces antibodies with one specificity.
Question 5 of 5
In which of the following developmental stages of T cells are surface molecules CD4 and CD8 NOT expressed?
Correct Answer: A
Rationale: Double-negative (DN) cells lack both CD4 and CD8, unlike DP (both expressed) and SP (one expressed) stages.