AQA A Level Biology复习笔记2.5.5 The Role of Antigen-Presenting Cells

Category: A-level课程, 教材笔记, 福利干货 Date: 2022年6月28日上午10:56

T-lymphocytes produce an immune response when they are exposed to a specific antigen
T cells will only bind to an antigen if it is present on the surface of an antigen-presenting cell
- These cells present the antigens from toxins, foreign cells and ingested pathogens
- They help to recruit other cells of the immune system to produce a specific immune response
An antigen-presenting cell is one of the host's cells
- It might be a macrophage or a body cell that has been invaded by a pathogen and is displaying the antigen on its cell surface membrane
Once the surface receptor of the T cell binds to the specific complementary antigen it becomes sensitised and starts dividing to produce a clone of cells

转载自savemyexams