ATI RN
Pediatric Immunizations NCLEX Questions Questions
Question 1 of 5
Which of the following is required for a CD8+ cell to differentiate into an effector cytotoxic T cell (CTL)? Is this a physical interaction?
Correct Answer: D
Rationale: CD8+ differentiation requires antigen recognition and CD4+ TH costimulation, involving physical interaction.
Question 2 of 5
What type of cells produce type I interferons (IFN-α and IFN-β)?
Correct Answer: C
Rationale: Plasmacytoid dendritic cells are the primary producers of type I interferons.
Question 3 of 5
The membrane attack complex (MAC) uses C3 to activate the final part of the complement pathway. It is important in defense against Neisseria. Which of the following components is/are inserted into the plasma membrane of the target cell, allowing for free passage of water/solute and thus killing the cell?
Correct Answer: D
Rationale: C5b-C9 form the MAC, with C9 polymerizing to lyse the target cell.
Question 4 of 5
Increases marrow production of neutrophils
Correct Answer: C
Rationale: G-CSF stimulates neutrophil production in bone marrow.
Question 5 of 5
Increases vascular permeability
Correct Answer: B
Rationale: Histamine, released by mast cells, increases vascular permeability, aiding immune cell infiltration to the site of infection.