PSL301H1 Lecture Notes - Lecture 4: Dendritic Cell, Adaptive Immune System, Cytotoxic T Cell

• School: UTSG
• Department: Physiology
• Course: PSL301H1
• Professor: Michelle French

Document Summary

Acquired immune responses are antigen-specific responses body recognizes a particular foreign substance and selectively responds to it; they are also slower upon first exposure. Th cells: nk cells attack and destroy virus-infected cells and tumour cells. Cytotoxic cells that release chemicals to destroy antibody-tagged pathogens. Cytokines released by inflammatory response attract more lymphocytes to the site of an immune reaction. Additional cytokines are released by the lymphocytes to up-regulate inflammatory response. Specificity activated by and responds to a specific antigen: both b and t cells have receptors that. Antigens: something causing immune response. recognize specific shapes. Versatility ready to confront any antigen at anytime: different b and t cells have different receptors. Memory remembers any antigen it has encountered: some activated b and t cells are long lasting. Tolerance responds to foreign substances by the normal tissues (doesn"t attack the self .