"describe and explain the ummune response in the human body in terms of:
- interaction between B and T lymphocytes
- the mechanisms that allow interaction between B and T lymphocytes
- the range of T lymphocyte types and the difference in their roles"
ok, im having a bit of trouble with this d/p
timmy's notes are outa excel and that book isnt that helpful, and tele's notes... well, are non-existing for this d/p..
so:
a) The interaction between B and T lymphocytes
B and T lymphocytes interact as they are both attacking the same antigen. Often the T-helper cells recognise the antigen and initiate the activities of B and T cells.
b) The mechanisms that allow interaction between B and T lymphocytes
The T cell produces a soluble factor after interaction with an antigen and B cells react with this factor, and its associated antigen to start producing antibodies.
Another mechanism for interaction is based between the T and B cell contact. The close contact comes about because of interaction with the antigen. This contact allows the T cell to signal the B cell to become a functional antibody-producing cell.
c) The range of T lymphocyte types and the difference in their roles
Killer T Cells - secrete chemicals that kill antigens directly and enhance the activity of macrophages and inhibit the replication of viruses.
Helper T Cells - enhance antibody production by B cells
Suppressor T cells - turn off immune response after infection has been controlled
Memory T cells - retain ability to recognise antigens, so that a subsequent invasions can be dealt with quickly.
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a) and c) are understandable, but would some1 please elaborate more on b) . . i dnt understand it
- interaction between B and T lymphocytes
- the mechanisms that allow interaction between B and T lymphocytes
- the range of T lymphocyte types and the difference in their roles"
ok, im having a bit of trouble with this d/p
timmy's notes are outa excel and that book isnt that helpful, and tele's notes... well, are non-existing for this d/p..
so:
a) The interaction between B and T lymphocytes
B and T lymphocytes interact as they are both attacking the same antigen. Often the T-helper cells recognise the antigen and initiate the activities of B and T cells.
b) The mechanisms that allow interaction between B and T lymphocytes
The T cell produces a soluble factor after interaction with an antigen and B cells react with this factor, and its associated antigen to start producing antibodies.
Another mechanism for interaction is based between the T and B cell contact. The close contact comes about because of interaction with the antigen. This contact allows the T cell to signal the B cell to become a functional antibody-producing cell.
c) The range of T lymphocyte types and the difference in their roles
Killer T Cells - secrete chemicals that kill antigens directly and enhance the activity of macrophages and inhibit the replication of viruses.
Helper T Cells - enhance antibody production by B cells
Suppressor T cells - turn off immune response after infection has been controlled
Memory T cells - retain ability to recognise antigens, so that a subsequent invasions can be dealt with quickly.
_________________________________________
a) and c) are understandable, but would some1 please elaborate more on b) . . i dnt understand it