Chapter 13

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Across
  1. 2. – immunity gained from receiving preformed antibodies
  2. 6. – T cell that directly kills infected or abnormal cells
  3. 9. – immunity developed from exposure to antigen and production of antibodies
  4. 11. – immunity involving T cells attacking infected cells
  5. 12. – a protein produced by B cells that binds to a specific antigen
  6. 15. – T cell that activates B cells and other immune cells
  7. 16. – ability of immune system to remember and respond quickly to antigens
Down
  1. 1. – immunity involving antibodies circulating in body fluids
  2. 3. – initial immune response when first exposed to an antigen
  3. 4. – introduction of antigen to stimulate immunity without causing disease
  4. 5. – faster and stronger immune response upon re exposure
  5. 7. – activated B cell that secretes large amounts of antibodies
  6. 8. – lymphocyte that matures in thymus and helps control immune responses
  7. 10. – long lasting cell that provides faster response upon second exposure
  8. 11. – process where specific lymphocytes are selected and multiply after antigen exposure
  9. 12. – a foreign substance that triggers a specific immune response
  10. 13. – lymphocyte that matures in bone marrow and produces antibodies
  11. 14. – molecules on cell surfaces that present antigens to T cells