ATI RN
Pediatric Immunizations NCLEX Questions Questions
Question 1 of 5
Phagocytic white cells (leukocytes, e.g. macrophages) congregate within when foreign organisms get through a cut in the skin.
Correct Answer: D
Rationale: Phagocytes like macrophages take hours to congregate at an infection site via chemotaxis, as this involves signaling, migration, and accumulation after a breach in the skin.
Question 2 of 5
How many doses of the Hepatitis B vaccine (5 μg HBsAg in 0.5 mL intramuscular) are required to reach a protective level of antibody?
Correct Answer: C
Rationale: The standard Hepatitis B vaccine requires three doses to achieve protective antibody levels, typically at 0, 1, and 6 months.
Question 3 of 5
Which of the following is a glycoprotein expressed on the surface of T helper cells, regulatory T cells, monocytes, macrophages, and dendritic cells?
Correct Answer: A
Rationale: CD4+ is expressed on T helper cells, regulatory T cells, and some innate cells like macrophages, aiding immune coordination.
Question 4 of 5
Recognize antigens bound to MHC
Correct Answer: B
Rationale: TCRs recognize antigens presented by MHC molecules, unlike BCRs which bind free antigens.
Question 5 of 5
If the structure of an individuals MHC molecules makes it impossible for them to recognize and bind any peptide antigen from a given virus, that individual will still be able to activate a T cell response to cells infected with that virus.
Correct Answer: B
Rationale: If MHC cannot bind viral peptides, T cells cannot be activated, as MHC presentation is essential for T cell recognition.