ATI RN
Lymphatic System Review Questions Questions
Question 1 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 2 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.
Question 3 of 5
Complete this sentence. Major histocompatability complex type I (MHC)
Correct Answer: B
Rationale: MHC1 is on all nucleated cells, presenting processed peptides (8-10 aa) to CD8+ T cells, not CD4+.
Question 4 of 5
During negative selection, a strong interaction between an immature T cell receptor and self-peptide:
Correct Answer: D
Rationale: Strong binding triggers apoptosis to eliminate autoreactive T cells, not rescue or migration.
Question 5 of 5
A proposed mechanism of suppression by which T-reg may cause T cell metabolic disruption is:
Correct Answer: D
Rationale: Tregs suppress via IL-2 deprivation (CD25), LAG3-MHCII inhibition, and granzyme-induced apoptosis.