6.3 Adaptive Immunity (Third Line of Defense)

Question 1

Adaptive Immunity:

Answer 1

Specific (it differentiates between pathogens and responds accordingly)
Adaptive (produces a heightened response upon re-exposure)

Question 2

Adaptive immune system is coordinated by lymphocytes (explain types)

Answer 2

• B lymphocytes are responsible for antibody production
• Cytotoxic T lymphocytes (TC cells) target tumors and virally infected cells
• Helper T lymphocytes (THcells) release cytokines to activate Band TC cells
• Regulatory T cells (T regs) suppress immune responses post-infection

Question 3

Antigens

Answer 3

foreign fragments that lymphocytes respond to pathogens by targeting
- Antigens fragments may be displayed on the surface of monocytes (antigen presenting cells)