Match the cytokine action to its description:

What is the role of IgD in the immune system?

Acute-phase reactants are also called “soluble factors.”

Match the antigen type to its correct description:

Haptens are small molecules (small proteins) that can stimulate acute allergic reactions.

Which immunoglobulin is primarily produced during the primary antibody response?

What does the immune system do in adaptive immunity?

What is the primary function of MHC (Major Histocompatibility Complex) molecules?

The bone marrow is the primary site for the maturation of T lymphocytes.

Cytotoxic T cells (CTLs) are responsible for directly killing infected and cancerous cells.