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Immune system for moodle
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    Immune system for moodle Immune system for moodle Presentation Transcript

    • Pathogens - Agents ofPathogens - Agents ofDiseaseDiseaseBacteriaProtistsVirusesWormsFungi
    • Viruses are NOT alive!Viruses are NOT alive!Not made of cells!Do not use energyMade of nucleic acid surrounded by aprotein coatGenes are expressed using the machinery ofthe host cell they infectHeadTailsheathDNATailfiberRNACapsidproteinsRNACapsidSurfaceproteins Membraneenvelope
    • The Immune System:The Immune System:Non-Specific DefensesNon-Specific Defenses1stlineSkin, mucus, tears, stomach acid2ndline – Inflammatory ResponseBlood flow increases to site of tissue damageWBC’s called macrophages ingest and destroy the pathogenFever
    • Specific DefensesSpecific DefensesImmune system response toONE PARTICULAR pathogenTriggered by an antigen onsurface of pathogensAntibodies bind to antigensAntibodies mark antigens fordestruction by themacrophagesVery specific
    • Immunological MemoryImmunological MemoryPrimary Immune ResponseSecondary Immune Response
    • Immune System Disorders:Immune System Disorders:AllergiesOverreactions of the immunesystemMast cells produce histaminesSignals inflammationAutoimmune DisordersImmune system mistakenlyattacks its own cellsType 1 Diabetes, rheumatoidarthritis