Question

what is the primary function of cytotoxic t cells?
activate complement proteins
produce antibodies
present antigens to b cells
kill virus-infected and cancer cells
question 6 (1 point)
which antibody class is most abundant in the bloodstream and crosses the placenta?
ige
igm
iga
igg

Explanation:

• Cytotoxic T cells are a type of immune cell that can kill certain cells, such as foreign cells, cancer cells, and cells infected with a virus.
• Immunoglobulin G (IgG) is the most abundant antibody in the bloodstream and is the only antibody that can cross the placenta, providing passive immunity to the fetus.

Answer:

• For the first question: Kill virus - infected and cancer cells.
• For the second question: IgG.