ATI RN
Lymphatic System Test Questions Questions
Question 1 of 5
The antibody that is first formed after infection is:
Correct Answer: B
Rationale: IgM is the first antibody in primary response; IgG follows.
Question 2 of 5
Lysozyme:
Correct Answer: D
Rationale: Lysozyme splits peptidoglycan in bacterial cell walls, an enzymatic action, not complement activation.
Question 3 of 5
Which of the following explains why immunity to influenza may appear to be relatively short-lived?
Correct Answer: D
Rationale: New influenza variants (antigenic drift/shift) escape prior immunity, requiring updated responses.
Question 4 of 5
Which of the following cells participate in nonspecific defense responses when your body is invaded by microbes?
Correct Answer: D
Rationale: NK cells , macrophages , and neutrophils are innate; all participate.
Question 5 of 5
Which of the following would be a BCR?
Correct Answer: D
Rationale: IgD is a B-cell receptor; CD4 is on T cells, MHC (B, C) presents.