Immunologic activation
Immunologic Activation
Immunologic Activation (pronunciation: /ɪˌmjuːnəˈlɒdʒɪk æktɪˈveɪʃən/) refers to the process by which the immune system is stimulated to respond to a foreign substance or pathogen. This process involves a series of complex interactions between various cells and molecules of the immune system.
Etymology
The term "Immunologic Activation" is derived from the words "immune", which comes from the Latin word "immunis" meaning exempt or protected, and "activation", which comes from the Latin word "activare" meaning to set in motion or to drive.
Process
Immunologic activation begins when a foreign substance, known as an antigen, enters the body. This antigen is recognized by antigen-presenting cells (APCs), which engulf the antigen and present fragments of it on their surface. These fragments are recognized by T cells, a type of white blood cell, which then become activated. Activated T cells can then stimulate B cells to produce antibodies specific to the antigen, leading to its destruction.
Related Terms
- Antigen: A substance that triggers an immune response when introduced into the body.
- Antigen-presenting cells (APCs): Cells that capture antigens and present them to T cells to initiate an immune response.
- T cells: A type of white blood cell that plays a central role in cell-mediated immunity.
- B cells: A type of white blood cell that produces antibodies in response to antigens.
- Antibodies: Proteins produced by B cells that can bind to specific antigens and neutralize them.
See Also
External links
- Medical encyclopedia article on Immunologic activation
- Wikipedia's article - Immunologic activation
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