BIO 11 Lecture Notes - Lecture 25: Natural Killer Cell, Glycocalyx, Perforin
Document Summary
Physical barriers: skin - impermeable membrane, mucous membrane - line respiratory system & can trap foreign invaders, hair follicles, cilia, nasal hairs. Phagocytes attachment of lysosome that dissolves foreign invader or pathogen, vacuole or vesicle forms, once broken down pathogen exocytosis occurs: most attach to pathogens tagged by antibodies, macrophages. Eosinophils or neutrophils: macrophages and microphages can be either . Migratory - mobile, travel, not only in one spot. Target whatever is not self - completely not specific. Complement series of inactive plasma proteins: labeled either. Factors b,d,p: any will become active in presence of antigen covered in antibodies, antigen/antibody complex, can lyse foreign invader causing it to explode, any site of inflammation will activate it, can increase vasodilation, can allow chemotaxis. Process of releasing chemicals to attract other white blood cells. Interferon - chemical released by cell to protect a neighboring cell: warns cells of foreign invaders, inhibits viruses to multiply inside cells.
