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KEY CONCEPT Germs cause many diseases in humans.
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],tick
KEY CONCEPT The immune systems consists of organs, cells, and molecules that fight infections.
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],antibody pathogens
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
KEY CONCEPT The immune system has many responses to pathogens and foreign cells.
[object Object],[object Object],[object Object],[object Object],[object Object],capillary wall extracellular  space white blood cell
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],virus antigens
[object Object],[object Object],pathogen antigens T cell receptors activated T cells antigens memory T cells
[object Object],[object Object],memory B cells activated B cells antibodies B cell T cell pathogen
[object Object],[object Object],[object Object],B cell T cell
[object Object],[object Object],[object Object],[object Object],[object Object]
KEY CONCEPT Living in a clean environment and building immunity help keep a person healthy.
[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],A bacterium carries genes for antibiotic resistance on a plasmid. A copy of the plasmid is transferred through conjugation. Resistance is quickly spread through many bacteria.
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],A memory B cell is stimulated when the real pathogen binds to it. 2 The B cell quickly activates and makes antibodies that fight the pathogens before you get sick. 3 Antigens in a vaccine trigger an immune response, and memory B cells are made. 1 memory B cells
KEY CONCEPT An overactive immune system can make the body very unhealthy.
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object]
KEY CONCEPT When the immune system is weakened, the body cannot fight off disease.
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],HIV T cell dead T cell antibody activated B cell
[object Object],[object Object],[object Object]

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Unit 31 Immune System

  • 1. KEY CONCEPT Germs cause many diseases in humans.
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12. KEY CONCEPT The immune systems consists of organs, cells, and molecules that fight infections.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17. KEY CONCEPT The immune system has many responses to pathogens and foreign cells.
  • 18.
  • 19.
  • 20.
  • 21.
  • 22.
  • 23.
  • 24.
  • 25. KEY CONCEPT Living in a clean environment and building immunity help keep a person healthy.
  • 26.
  • 27.
  • 28.
  • 29.
  • 30.
  • 31. KEY CONCEPT An overactive immune system can make the body very unhealthy.
  • 32.
  • 33.
  • 34.
  • 35.
  • 36.
  • 37. KEY CONCEPT When the immune system is weakened, the body cannot fight off disease.
  • 38.
  • 39.
  • 40.
  • 41.
  • 42.