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Micro exam 3
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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
ID
51428
Card Set
Micro exam 3
Description
focused on cells
Updated
2010-11-24T00:12:38Z
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