Immunological Memory
For more details on this topic, see Immunity (medical).When B cells and T cells are activated some will become memory cells. Throughout the lifetime of an animal these memory cells form a database of effective B and T lymphocytes. Upon interaction with a previously encountered antigen, the appropriate memory cells are selected and activated. In this manner, the second and subsequent exposures to an antigen produce a stronger and faster immune response. This is "adaptive" because the body's immune system prepares itself for future challenges. Immunological memory can either be in the form of passive short-term memory or active long-term memory.
Read more about this topic: Adaptive Immune System
Famous quotes containing the word memory:
“You are told a lot about your education, but some beautiful, sacred memory, preserved since childhood, is perhaps the best education of all. If a man carries many such memories into life with him, he is saved for the rest of his days. And even if only one good memory is left in our hearts, it may also be the instrument of our salvation one day.”
—Feodor Dostoyevsky (1821–1881)