Bio Lecture Ch 42 Vocab

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  1. Pathogens
    Harmful organisms and viruses that can cause disease.
  2. Phases of Defense Response (3)
    • Recognition Phase - the organism must be able to distinguish self and non self
    • Activation Phase - leads to the movement of cells and molecules to fight the invader
    • Effector Phase - the mobile cells destroying the invader cells
  3. Types of Defense Mechanisms (2)
    • Nonspecific (innate) defenses
    • Specific (adaptive) defenses
  4. Nonspecific (innate) defenses
    • provide the first line of defense
    • acts within minutes to hours
  5. Specific (adaptive) Defenses
    • aimed at specific pathogens
    • can make a specific target protein to destroy a specific pathogen
    • develop slowly and are long lasting
  6. Blood Plasma
    • solution containing ions, molecular solutes, soluble proteins
    • suspended in the plasma; RBCs, WBCs, Platelets
  7. Lymph
    • fluid derived from blood and other tissues in the intercellular spaces
    • moves through the vessels of the lymphatic system
  8. Lymph Nodes
    sites along the lymph vessel that contains lymphocytes that filters lymph and activates an immune response
  9. Lymphocytes
    • a type of white blood cell in lymph nodes
    • they encounter foreign cells and initiate immune response
  10. Types of White Blood Cells (2)
    • Phagocytes
    • lymphocytes
  11. B Cells and T Cells
    • types of lymphocytes
    • smaller than phagocytes
  12. Antibodies
    • Proteins that bind to specific substances IDed by the immune system
    • "nonself / altered self"
    • can inactivate viruses and toxins
    • produced by B Cells
  13. Major Histocompatibility Complex (MHC)
    • proteins important for self IDing labels
    • play major role in coordinating interactions between lymphocytes and macrophages
  14. T Cell Receptors
    • integral membrane proteins
    • recognize and bind to nonself substances
  15. cytokines
    • soluble signaling proteins
    • released by many cell types
    • they alter the behavior of their target cells
  16. Normal Flora
    • bacteria and fungi that normally live in great numbers on our bodies
    • don't cause disease
  17. lysozyme
    • enzymes in the nose and other system
    • attacks the cells walls of many bacteria and causes them to explode
  18. complement proteins
    • antimicrobial proteins
    • have a characteristic sequence
  19. interferons
    • signaling proteins
    • increase resistance to infection
  20. mast cells
    • the first responders to tissue damage
    • release chemical signals
Card Set
Bio Lecture Ch 42 Vocab
Ch 42 "Immunology"
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