NURS 364 Lecture Notes - Lecture 13: Antigen-Presenting Cell, Adaptive Immune System, Innate Immune System
14 Dec 2017
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Document Summary
A complex system that is responsible for distinguishing us from everything foreign to us, and for protecting us against infections and foreign substances. ---fights off pathogens, whether bacteria, fungi, protist or virus. The immune system works to seek and kill invaders. Adaptive immunity rapid response same response no matter what type of pathogen, will be the same each time it sees the pathogen whether it"s the first time or the 36329221st time. Innate because shared by all animals and exist from birth. Action is immediate (it is active at the time of infection) -- Does not distinguish between different microbes doesn"t matter what causes it doesn"t even need to be a pathogen just a stimulus. Response is not enhanced on enhanced on repeated exposure to pathogen. It is divided into two stages: non-inflammatory reaction (body"s static defenses) skin, gastric acid (ph 2), lysozyme in tears, saliva, mucous local inflammation. Migration of phagocytes and plasma protein into infected tissues.
