PAT 20A/B Study Guide - Midterm Guide: Innate Lymphoid Cell, Cytotoxic T Cell, Natural Killer Cell
13 Jan 2017
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Early, rapid responses ( within mins to hours) Cellular and biochemical defenses that are in place before infection things that happen before infection: prevents the establishment of infection, prevents deeper tissue penetration of microorganisms. It can function immediately as an effective barrier to microbes. No memory: not trained to go against a specific treat. Major components : skin, blood, mucous membranes, phagocytic cells ( mainly neutrophils & tissues macrophages) Can recognize microbial structures: they contain features that human cells would not have sugar, lipid molecules, proteins. Causing redness and swelling when you have a cut. Most innate responses= very effective in destroying the invader: but pathogenic microbes have evolved to evade innate defenses. Neutrophils are the early responding cells of innate. More effective than innate, but late responses: very focused can differentiate between different microbes. Acquired immunity: acquired through previous exposure to infectious/foreign particles learned behavior. Physical, molecular, chemical, and cellular defenses that are in place before infection.
