Best Answer: There are two kinds of immunities in our body- 1. Cell mediated and 2. Antibody mediated. In the CELL MEDIATED IMMUNITY, the T-cells are responsible. They directly attack the infected or antigen cells.

They go to the site of infected cells, and destroy and release a chemical which will stimulate the other pahgocytic cells to come at the rescue to engulf these cells. This job is done by the 'KILLER T-CELLS'.

There are other two types also- 1). The HELPER T-CELLS: they activate the B-cells for antibody formation. And 2) SUPPRESSOR T-CELLS: they prevent the activity of antibody formation in case of autoimmunity problem. B- CELLS: these cells form the ANTIBODY MEDIATED IMMUNITY. Whenever any antigen enters the body, they start antibody formation against the antigen, instead of directly attacking the cells.

Both B cells and T cells carry customized receptor molecules that allow them to recognize and respond to their specific targets. Patch For Adobe Reader 9.4 here. The B cell's antigen-specific receptor that sits on its outer surface is also a sample of the antibody it is prepared to manufacture. When the antibody-receptor binds to a matching antigen, the B cell takes in the antigen and processes it.

The principal functions of B cells are to make antibodies against antigens, perform the role of antigen-presenting cells (APCs) and eventually develop into memory B cells after activation by antigen interaction. B cells are an essential component of the adaptive immune system. B cell recognition of antigen is not the only element necessary for B cell activation (a combination of clonal proliferation and terminal differentiation into plasma cells). Chapter 10 - Activation and Function of T and B. IgG antibody responses are augmented by TH1 cells. T cells by B-cells that already have the ability to make.

This triggers the B cell to become a large plasma cell, producing millions of copies of the same specific antibody. These antibodies then circulate in the bloodstream in search of more matching antigens. B cell antibodies cannot themselves kill an invading organism, but they can use their antibodies to mark invaders for destruction by other immune cells and by complement. • Tell us some more • Upload in Progress • Upload failed. Please upload a file larger than 100x100 pixels • We are experiencing some problems, please try again.

Once the B cell is activated, it proliferates to produce lots of activated B cells. We already know that antibodies are produced by B cells. Start studying Immunity 3. Monomer attached to the surface of B cells, important in B cell activation. Plasma cells make over a billion types of antibodies.

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B cells and T cells -A B cel has a receptor called a B cell receptor (BCR) -An activated B cell will secrete copies of its receptor (humoral immunity) -Antibodies are the actual mediators that destroy pathogens. Antibodies are found in the blood and body fluids that used to be known as the body's humors -A T cell has a receptor that only recognizes antigen and aids in the activation of the specific cell (cell mediated immunity) -Every receptor on every naive B cell or naive T cell is different from all other B cells and T cells and each one is UNIQUE. Naive T cells or B cells must be activated by two signals for them to respond to an infection -Activated T cells and B cells respond to this infection by proliferating to become effector cells to eliminate the current infection and make memory cells that will protect the host from future infections from that organism -Effector B cells (plasma cells) make antibodies, effector T helper cells make cytokines, and effector T cytotoxic cells kill -Memory cells are clones of the original T or B cell that wait for the next infection to become reactivated. Lymph nodes: filter and monitors the lymph.