The immune response

Immune Response

The immune response is quite a complex topic.

There are various types of white blood cells:

Phagocytic cells include: Neutrophils, Macrophages

Lymphocytes: B Lymphocytes and T lymphocytes

Phagocytes

These are a type of white blood cells that engulf the pathogens.

Macrophages are a specialised type of phagocyte. They engulf the pathogen and then display the pathogens antigens on their own cell surface membrane. The macrophage then acts as an antigen presenting cell.

APC in immune response

For more images of the immune system see Alila Medical Media.

 

The antigen presenting cells will help to activate the rest of the immune system. The T helper cell will bind using its receptor onto the antigen on the outside of the antigen presenting cell. Once the T helper cell has been activated interleukins will be released and these will stimulate the B cells to divide. The B cells are part of the humoral response and they will produce antibodies to deal with the infection. The B plasma cells are the cells that produce the antibodies. Antibodies are specific to a particular antigen. The shape of the antibody is complementary to that of the antigen (Do not say they are the same shape) .At the same time Killer T cells will destroy any infected cells.

Immune system basics: Function of T helper cells

For more images of the immune system see Alila Medical Media.

The killer cells will destroy infected cells. These could be body cells with a virus or a cancer cell

T_killer

For more images of the immune system see Alila Medical Media.