ATI RN
NCLEX Pediatric Immunization Questions Questions
Question 1 of 5
Which of the following component molecules is activated in the classical pathway after binding to an Fc?
Correct Answer: A
Rationale: C1 binds to the Fc region of antibodies to initiate the classical pathway.
Question 2 of 5
Which of the following are secreted by macrophages after they have recognized pathogens using pattern recognition molecules (induction phase)?
Correct Answer: D
Rationale: Macrophages secrete TNF (and IL-1/IL-6) during the induction phase.
Question 3 of 5
Which of the following would NOT act initially during mast cell (or basophil) activation?
Correct Answer: D
Rationale: Prostaglandins are secondary mediators produced after initial mast cell degranulation, unlike histamine and proteases which act immediately.
Question 4 of 5
Which of the following is NOT true about live vaccines?
Correct Answer: B
Rationale: Live vaccines are highly effective due to replication and antigen presentation, not the least effective.
Question 5 of 5
Which of the following diseases occurs with the absence of a thymus?
Correct Answer: A
Rationale: DiGeorge's syndrome is characterized by thymic aplasia, impairing T cell development.