ATI RN
Immune System Multiple Choice Questions and Answers Questions
Question 1 of 5
The two main functions of the lymphatic system are
Correct Answer: D
Rationale: The lymphatic system returns interstitial fluid to blood and combats infections via lymph nodes and organs, not coagulation or hormone production.
Question 2 of 5
Which of the following options best describes an opsonising agent?
Correct Answer: C
Rationale: C3b coats pathogens to enhance phagocytosis (opsonization), while antibodies also opsonize, but surfactants do not; C3b is the most specific example here.
Question 3 of 5
What is the major structural difference between B cell antigen receptor (BCRs) and secreted antibody?
Correct Answer: B
Rationale: BCRs have a transmembrane tail, while secreted antibodies lack it, retaining two binding sites.
Question 4 of 5
The following statement correctly describes a common feature of T & B cell development:
Correct Answer: B
Rationale: Both T and B cells rearrange receptor genes stepwise for diversity, not multiple specificities or abundant self-reactivity.
Question 5 of 5
Cell-associated differentiation antigens (CDs) are functional cell surface proteins or receptors that can be measured in situ.
Correct Answer: D
Rationale: All statements (A, B, C) about CDs are true, making D correct; CDs aid disease management, are low in serum, and many are known.