Which of the Following Statements About the Antigen-Presenting Function of Macrophages

Multiple Choice

Which of the following statements about the antigen-presenting function of macrophages is NOT correct?

A) Macrophages are particularly important at presenting peptides derived from particulate or opsonized antigens that are internalized by phagocytosis.
B) Macrophages become activated by the helper T cells to which they present microbial peptides,and as a result of this activation they become efficient at killing the microbes.
C) Resting macrophages express low levels of class II MHC molecules,but higher class II MHC expression is induced on activation by the T cells to which they present antigen.
D) Macrophages express highly variable,high-affinity receptors for many different antigens,and these receptors facilitate the internalization of the antigens for processing and presentation.
E) Macrophages present antigen to T cells in lymphoid organs and many nonlymphoid organs.