BIO 205 Test #3 Lymphocytes and Immunity.txt

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ralejo
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147973
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BIO 205 Test #3 Lymphocytes and Immunity.txt
Updated:
2012-04-16 18:09:44
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lymphocytes
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  1. Microbes
    • Bacteria
    • Viruses
    • Prions
    • If causes disease in humans, called a pathogen
  2. Normal Defense
    • 1. Physical/chemical barriers: skin, mucous membranes, shell
    • 2. Nonspecific early response: inflammation, secretions (e.g. mucous)
    • 3. Specific response
  3. Bacteria
    • Single cell organism
    • Prokaryote
    • 3 common shapes: bacillis (rod), coccus (ball), spirillum (spiral)
  4. Anatomy of Bacterium
    • Cell wall
    • Sticky to stick to surfaces
    • Pilus (long, hollow appendage to transfer DNA/RNA from one to another)
    • Nucleoid region
    • Plasmid
  5. Bacterial Diseases
    • Toxin released when e-coli dies
    • When botulinum exposed to air, has exotoxin with botulism
  6. Viruses
    • NOT a cell
    • NOT alive
    • When outside of cell, cannot kill you unless inside of cell
  7. Viral Structure
    • Nucleic acid in a protein coat
    • Outer protein capsid
    • Inner DNA or RNA core
  8. Viral Reproduction
    • Needs to break and enter the cell
    • Bind to receptors
    • Drop contents in cell
    • Hi-jacks cell (makes hundreds or thousands of viruses): will have codes, viral RNA
    • Put itself together and escapes to infect other cells in body
  9. �New� Viruses
    • Ebola virus
    • West Nile virus
    • SARS virus
  10. Prions
    • Particles made of protein that can help
    • Make diseases that affect nervous system
  11. Prion Diseases
    • Bovine spongiform encephalopathy (Mad Cow Disease)
    • Can be inherited
  12. Lymphatic System: Functions
    • 1. Absorb excess tissue fluid (lymph)
    • 2. Absorb fats in small intestine
    • 3. Make, maintain, and send lymphocytes
    • 4. Defend against pathogens
  13. Lymph Travel
    • Lymph capillaries
    • Lymph vessels
    • Lymph ducts
  14. Lymphatic Organs
    • Primary Organs: Sites where lymphocytes made/formed/mature
    • Secondary: Organs: Sites where lymphocytes stored or work
    • Lymphocytes are viral diseases
    • Bacterial infections found in blood
    • Neutrophils
  15. Primary Organs
    • 1. Red Bone Marrow
    • B-Cells made here!
    • B-cells are a type of lymphocytes
    • 2. Thymus
    • T-Cells made here
    • 99% fat
    • Made when we were kids
  16. Secondary Organ
    • 1. Spleen
    • 2. Lymph Node
    • 3. MALT (mucosa associated lymphoid tissue)
    • 4. Tonsils
  17. Spleen
    • White pulp: Reservoir of lymphocytes (also in bone marrow)
    • Red pulp: More red than white, has red blood cells, RBCs filtered
    • Venous sinus
  18. Lymph Node
    • Getting rid of debris before dumping it in blood to the heart
    • Filter debris
    • Enlarge when there are more lymphocytes (a good thing)
  19. Tonsils
    • 6 tonsils in life
    • Lymphatic organs
    • 1st organ that come in contact with pathogens

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