ATI RN
Lymphatic System Multiple Choice Questions and Answers Questions
Question 1 of 5
Which is the major difference between CD8+ and NK cell cytotoxicity?
Correct Answer: D
Rationale: CD8+ T cells target viral antigens on MHC1, while NK cells kill nonspecifically (e.g., low MHC), both using apoptosis.
Question 2 of 5
In agglutination reactions, the antigen is a_____________ and in precipitation reactions, the antigen is a_____________ ______...
Correct Answer: A
Rationale: Agglutination uses whole cells , precipitation uses soluble antigens; not reversed or specific types (C, D).
Question 3 of 5
Instant and immediate protection obtained through:
Correct Answer: C
Rationale: Passive immunity provides instant protection; active (A, D) takes time.
Question 4 of 5
Influenza viruses infect humans and elicit an immune response that is often insufficient to protect the individual from sickness or death. Which of the following structures are on influenza viruses, allowing them to be recognized by the human immune system?
Correct Answer: C
Rationale: The molecules on the virus that are not on host cells are the pathogen-associated molecular patterns. The pattern recognition receptors are found on host cells and molecules. MHC I and II molecules are present on all nucleated host cells but not on viruses. The somatically generated receptors are on host T and B lymphocytes.
Question 5 of 5
Pattern recognition receptors (PRR) include:
Correct Answer: A
Rationale: PRRs, like lectin-like molecules, recognize PAMPs (e.g., lipoteichoic acid, LPS), not the PAMPs themselves.