Immune system for moodle

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Immune system for moodle

  1. 1. Pathogens - Agents ofPathogens - Agents ofDiseaseDiseaseBacteriaProtistsVirusesWormsFungi
  2. 2. 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
  3. 3. 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
  4. 4. Specific DefensesSpecific DefensesImmune system response toONE PARTICULAR pathogenTriggered by an antigen onsurface of pathogensAntibodies bind to antigensAntibodies mark antigens fordestruction by themacrophagesVery specific
  5. 5. Immunological MemoryImmunological MemoryPrimary Immune ResponseSecondary Immune Response
  6. 6. Immune System Disorders:Immune System Disorders:AllergiesOverreactions of the immunesystemMast cells produce histaminesSignals inflammationAutoimmune DisordersImmune system mistakenlyattacks its own cellsType 1 Diabetes, rheumatoidarthritis

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