CD4+ T cells become helper T cells in response to:
A. exposure to antigen.
B. exposure to MHC class II peptide.
C. exposure to any MHC peptide.
D. exposure to MZ B cells.
E. exposure to TNF-a.
Answer: B
CD4+ T cells become helper T cells in response to:
A. exposure to antigen.
B. exposure to MHC class II peptide.
C. exposure to any MHC peptide.
D. exposure to MZ B cells.
E. exposure to TNF-a.
Answer: B