Immune System

Question 1

Antigen

Answer 1

Anything that generates an immune response.

Question 2

Pathogen

Answer 2

Generates a disease.

Question 3

Three levels of defense

Answer 3

*1st line: Barriers- skin, sweat, saliva, Reactions (sneezing, coughing, vomiting, diarrhea)
*2nd line:
*3rd line: T Cells & B Cells

Question 4

T Cells

Answer 4

• Cytotoxic: Destroy certain abnormal cells directy.
• Helper: Control immune response by releasing interleukins (molecules that stimulatet the production and activity of cytotoxic T cells).
• Regulatory: Suppress the imune response in order to prevent overactivity.
• Memory: Remember the antigen and start a rapid response if that antigen is contacted again.