The Role of Helper T cells Flashcards
Activated T-lymphocytes (those that have receptors specific to an antigen) divide by mitosis to increase in number (similar to the clonal selection and clonal expansion of B-lymphocytes)
These T-lymphocytes differentiate into two main types of T cell:
T helper cells
T killer cells
Helper T cells assist other
white blood cells in the immune response
Helper T cells assist other white blood cells in the immune response
They release ……………(hormone-like signals) which stimulate
cytokines
The maturation of B-lymphocytes into antibody-secreting plasma cells
The production of memory B cells
The activation of cytotoxic T cells, which destroy virus infected cells and tumour cells
An increased rate of phagocytosis
T killer cells patrol the body for
in search of antigen-presenting body cells
T killer cells attach to the
foreign antigens on the cell surface membranes of infected cells
When T killer cells attach they secrete
secrete toxic substances that kill the infected body cells, along with the pathogen inside
Perforins secreted by T killer cells
punch a hole in the cell surface membrane of infected cells, allowing toxins to enter
