ATI RN
Lymphatic System Review Questions Questions
Question 1 of 5
One surprising aspect of the immune system is that individuals make responses to human tissues from a different individual, causing serious problems for organ and tissue transplantation. The basis for this immune response is:
Correct Answer: A
Rationale: MHC polymorphism drives transplant rejection; microbes , blood groups , or APCs contribute less directly.
Question 2 of 5
The integrin LFA-1 is constitutively expressed on the surface of resting T cells. Yet, integrin-dependent T cell adhesion to antigen-presenting cells increases substantially following TCR stimulation. This increased integrin-dependent adhesion is mediated in part by:
Correct Answer: C
Rationale: TCR signaling shifts LFA-1 to high affinity ; not synthesis , transport , or just phosphorylation .
Question 3 of 5
A researcher who detects a higher-than-normal amount of interferon in a laboratory rat would correctly conclude that
Correct Answer: A
Rationale: Elevated interferon levels indicate a viral infection, as it's a specific antiviral response, not related to cancer, diet, or monocyte differentiation.
Question 4 of 5
Which of the following statements about antibodies is false?
Correct Answer: D
Rationale: Mammalian antibodies have five classes (IgM, IgG, IgA, IgE, IgD), not two, making D false; others are true.
Question 5 of 5
Which of the following statements is true for antimicrobial peptides (AMPs)?
Correct Answer: C
Rationale: AMPs primarily perforate bacterial membranes to cause lysis, targeting prokaryotes, not enhancing phagocytosis or binding eukaryotic membranes.