1. 31.3 Immune Responses Data Table- ruler colored pape

2. 31.3 Immune Responses KEY CONCEPT The immune system has many responses to pathogens and foreign cells.

3. 31.3 Immune Responses Two types of responses # 1 Nonspecific Responses-the same for every pathogen A.Inflammation B.blood vessels become leaky. C.white blood cells move toward infection and damaged tissue D. characterized by swelling, redness, and pain capillary wall extracellular space white blood cell

4. 31.3 Immune Responses E. Fever-body temperature increases. –High fevers can cause seizure, brain damage, and even death. –Low fevers stimulate white blood cells to mature.

5. 31.3 Immune Responses 2. Specific Responses 1st detect antigens (surface proteins on pathogens Each pathogen has a different antigen. virus antigens

6. 31.3 Immune Responses pathogen antigens T cell receptors activated T cells antigens memory T cells Two types of specific immune responses. A. Cellular immunity uses T cells to destroy infected body cells.

7. 31.3 Immune Responses. B. Humoral immunity uses B cells to produce antibodies. memory B cells activated B cells antibodies B cell T cell pathogen

8. 31.3 Immune Responses Both responses produce memory cells. –specialized T and B cells –provide acquired (active) immunity B cell T cell

9. 31.3 Immune Responses The immune system rejects foreign tissues. Tissue rejection occurs in organ or tissue transplants. Tissue rejection is the result of an immune response. –immune system detects protein markers on the donor tissue –makes antibodies against the donor’s tissue