Agent Index: 
  • Circulates in the blood and lymph.
  • Engulfs viruses, bacteria, infected cells that display the antigen on the surface.
  • Inserts engulfed viral antigen (protein) on their own surface membrane.
  • Signals to other immune cells (T-cells and B-cells).
  • Stimulates helper T cells to bind to the viral antigen on the macrophage surface causing the macrophage to release a protein called interleukin-1.
  • Interleukin-1 stimulates helper T cells to divide.
  • Engulfs viruses, bacteria, or infected cells coated in the antibody.
  • viruses
  • bacteria
  • an infected host cell displaying viral antigen on its surface
  • helper T cells
  • viruses, bacteria, or infected cells with antibodies bound to antigens
Agent Image: 
Parent Accordion Section: 
Agents of the Immune System