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Julie, a sixth grader, nearly always eats lunch with the same five or six girls.The girls usually spread out at their table so that no one else can join them.Sometimes they even plan together what they will wear to school the next day.Julie's group is an example of:
T Lymphocyte
A type of white blood cell that plays a central role in the immune response by attacking foreign invaders and cancer cells.
Memory T Cells
A type of T cell that remains in the body after an initial infection and helps to quickly respond to the same antigen upon re-exposure.
Antigenic Determinant
Specific part of an antigen that stimulates an immune system response by binding to receptors on the surface of lymphocytes; also called epitope.
Cell-mediated Immunity
A type of immunity where T cells directly attack infected or cancerous cells, as opposed to producing antibodies.
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