SUBJECTS
  American History
  Biographies
  Book Reports
  Computers
  Economics
  English
  Geography
  Government
  Health
  Miscellaneous
  Movies & Plays
  Music
  Poetry
  Religion
  Science
  Social Issues
  World History

  MEMBERS
  Login Here
  Forgot Password


Home / Register / Custom Writing / Contact Us

The below is a sample preview of the full essay that is available in our database. To see the full paper, just register for a free account. You get access to thousands of example term papers in our super free essay database without paying a cent.

SPONSORED PAPERS

Beginning of Paper
B Cells and T Cells

The graph shows the response of the human immune system to the exposure of an antigen in two phases. The first phase is that of a primary response to the initial attack. The second response is very rapid, subsequent to attacks from the same antigen. The specificity of this system relies h ....

Middle of Paper
.... with eukaryotic cells. There are three types of T cells: helper T cells, suppressor T cells, and cytotoxic T cells. The T cell receptor (helper T cells) recognizes foreign antigens displayed on the surface of the body’s own cells. When the cytotoxic T cell encounters this, it differentiates into active cells that attack and lyse the infected cells. They also release powerful chemicals known as “killer cells.” In period II, the antigen is again injected, however the memory cells recognize it and they immediately begin to produce antibodies, preventing furth ....

Words: 542   Pages: 3 Register To View Full Essay


MORE SPONSORED ESSAYS