Major types of antigen-presenting cells

Question 1

What are the major types of antigen-presenting cells?

Answer 1

Macrophages—present to naïve Thelper cells, and activate them (so naïve Th cells become antigen-experienced Th cells); express both MHC-1 and MHC-2, (so can also activate CD8+-Tcytotoxic T-cells)

Dendritic cells—present to naïve Thelper cells, and activate them; express both MHC-1 and MHC-2, so can also activate CD8+-Tcytotoxic T-cells

B lymphocytes (B cells)—present only to antigen-experienced Thelper cells