Micro exam 3

Cells of Immunity
- Lymphocytes
- Macrophages
Lymphocytes
- have very specific surface receptors for antigens.
- All look alike but actually 2 major types:
- T-lymphocytes(T-cells)
- B-lymphocytes(B-cells)
T-lymphocytes

Develop in thymus
B-lymphocytes
- : make antibodies
- Develop in bone marrow compartment
Macrophages
- Found in tissues and organs
- Play a major role in immunity
- Phagocytose antigen
- Degrade it (“processed antigen”)
- Redisplay processed antigen on surface
- Transported processed antigen to lymphoid tissue where T- and B- cells are waiting
Immune Response 2 major divisions
- Antibody mediated immunity (humoral)
- Cell-mediated immunity
Antibody-mediated immunity (humoral)

Defense processes that are mediated by antibodies
Cell-mediated immunity
- Defensemechanisms that are medicated by T-cells and:
- i. Eukaryotic pathogen
- ii. “Antigen marked” cell (ie: cell modified by viral infection, cancer or mutation)
- iii. Foreign transplants
- iv. Delayed-type hypersensitivity

Author

brogdert

51428

Card Set

Micro exam 3

Description

focused on cells

Updated

2010-11-24T00:12:38Z

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