ATI RN
Immune System Questions Questions
Question 1 of 5
Which of the following antibody is an important host defense against encapsulated bacteria?
Correct Answer: B
Rationale: IgG2 targets polysaccharides on encapsulated bacteria; others (A, C, D) are less specific.
Question 2 of 5
Which of the following immune cells/molecules are most effective at destroying intracellular pathogens?
Correct Answer: D
Rationale: T cytolytic cells (Tc cells) and Natural killer cells kill infected host cells which are harbouring intracellular pathogens, unlike antibodies or B cells (extracellular focus).
Question 3 of 5
Which of the following is not an acute phase protein:
Correct Answer: A
Rationale: Chondroitin sulfate is a structural molecule, not an acute phase protein like CRP or fibrinogen.
Question 4 of 5
Which of the following actually kills invading microbes?
Correct Answer: D
Rationale: Lysozymes degrade bacterial walls, stomach acid kills via pH, and intestinal enzymes digest microbes; all kill invaders.
Question 5 of 5
Cytotoxic T cells are called into action by the:
Correct Answer: B
Rationale: IL-2 activates cytotoxic T cells; IL-1 is broader, neutrophils are innate.