ATI RN
Lymphatic System Review Questions Questions
Question 1 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 2 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.
Question 3 of 5
Which of the following bind to mast cells and cross-link, resulting in degranulation and release of histamine?
Correct Answer: C
Rationale: IgE binds mast cells for histamine release; IgM , IgA , IgG , and interleukins don't.
Question 4 of 5
Cell-mediated immunity is carried out by_____________ while humoral immunity is mainly carried out by________
Correct Answer: C
Rationale: T cells drive cell-mediated, B cells humoral immunity; not reversed or others (B, D).
Question 5 of 5
In an antigen haptens are:
Correct Answer: B
Rationale: Haptens are non-immunogenic alone, needing carriers; not inherently immunogenic .