ATI RN
Immune System Questions Questions
Question 1 of 5
T cells that have a β T cell receptors:
Correct Answer: B
Rationale: αβ T cells (95% of T cells) express CD4 or CD8, require MHC, and drive adaptive immunity.
Question 2 of 5
Type II hypersensitivity is due to:
Correct Answer: D
Rationale: Type II involves antibodies (IgG/IgM) against mismatched cells; not IgE , T cells , or pollen .
Question 3 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 4 of 5
Which of the following system's job is to protect our body against disease-causing microbes?
Correct Answer: B
Rationale: Immune system defends against microbes; others (A, C, D) don't.
Question 5 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).