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Lecture_5

19 overview of the immune system innate immunity non

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19 Overview of the Immune System • Innate Immunity (non-speciFc) – Barriers to infection – In±ammation – Phagocytosis • Adaptive Immunity (speciFc) – Reaction to speciFc antigens • Parts of foreign proteins, sugars, chemicals – Body reacts to antigens when exposed • Retains “memory” of those antigens • ²aster response if exposed a second time
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20 The Innate Immune Response This nonspecifc immune response is the frst line oF deFense against invading pathogens. - Barriers - In±ammation Chemokines eg interleukin, TN² - α - Phagocytosis Macrophages, dendritic cells, neutrophils
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21 Barriers • Physical Barriers - Skin - Mucous membranes • Chemical barriers - Stomach = acid + digestive enzymes - Tears, saliva = lysozyme • Microbial barriers - Normal fora
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23 Innate Defenses: physical, chemical, and microbial barriers
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Infammation Infammation is a process by which the body’s white blood cells and chemicals protect us From inFection and Foreign substances such as bacteria and viruses . Complex biological response oF vascular tissues to harmFul
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19 Overview of the Immune System Innate Immunity non...

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