Immune System part 2

more on immune system

?

Primary response

Immune system can be spilt into cellular and humoral.

  • Cellular: the Tcells and other immune system cells that they interact with ( phagocytes form the cellular response.
  • Humoral: Bcells and the production of antibodies form the humoral response.

PRIMARY RESPONSE:

  • When an antigen enters the body for the first time, it activates the immune system. This is called the primary response
  • Its slow as there arent many bcells that make the antibody needed to bind to it
  • Eventually, the body will produce enough of the right antibody to overcome the infection
  • BUT in the mean time you will experience the symptoms of the disease
  • After being exposed to the antigen, Tcells and Bcells produce memory cells.
  • Memory cells will stay in the body for a long time
  • Memory Cells will recognise the specifigic antigen on the second time around.
  • They record the specific antibodies needed to bind to antigen.
  • Now the person is immune. - body can respond more quickly to a 2nd infection.
1 of 2

Secondary Response

SECONDARY RESPONSE

  • If the same pathogen enters the body again, the immune system will produce a quicker andstronger immune response.
  • Memory Bcells divide in to plasma cells to produce the right antibody to the antigen
  • Memory Cells divide in to the correct type of Tcell to kill the cell that carries the antigen.
  • Secondary response gets rid of the pathogen before you being to show any symptoms
2 of 2

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Health, illness and disease resources »