1. Goals & Objectives
Identify 2 non-specific immune responses
Define antigen and explain how antigens are involved in the specific immune response
Define memory cell and explain how memory cells are involved in specific immune responses

2. Warm up:
What are antigens and what do they do?

3. KEY CONCEPT The immune system has many responses to pathogens and foreign cells.

4. Nonspecific Responses:
Nonspecific responses are the same for every pathogen:
Inflammation
white blood cells move toward infection and damaged tissue
capillary wall
extracellular space
white blood cell
characterized by swelling, redness, and pain

5. Discussion Question:
What do you think the purpose of a fever is?

6. Nonspecific Responses:
Fever
Low fevers stimulate white blood cells to mature.
High fevers can cause seizure, brain damage, and even death.

7. Specific responses are different for each pathogen.
Involve detection of antigens
Antigens are surface proteins on pathogens
Each pathogen has a different antigen
virus
antigens

8. 2 specific immune responses:
Cellular immunity uses T cells to destroy infected body cells.
pathogen
antigens
T cell
receptors
activated T cells
memory T cells

9. Discussion Question:
According to the charts we filled out the other day, what are the jobs of the T cells and B cells?
T Cells –
B cells -

10. Humoral immunity uses B cells to produce antibodies that match the shape of the antigen
T cell
pathogen
memory B cells
activated B cells
antibodies

11. Specific responses produce memory cells.
B cell
T cell
Memory cells recognize pathogens quickly after the initial exposure
Causes a rapid immune response to prevent illness

12. Next:
Turn to pages and draw figure 31.1 in your notes.

13. Exit ticket:
What are the two different types of immunity? What is the difference?