Review of Cytotoxic vs Helper T Cells definitions Flashcards
Review of Cytotoxic vs Helper T Cells definitions
You can tap to flip the card.
Control buttons has been changed to "navigation" mode.
1/15Skip to main content
Cytotoxic T cells Immune cells with CD8 markers that recognize antigens on MHC class 1 molecules and induce apoptosis in infected cells. Helper T cells Immune cells with CD4 markers that recognize antigens on MHC class 2 molecules and activate other immune cells. MHC class 1 molecules Proteins found on all nucleated cells that present endogenous antigens to cytotoxic T cells. MHC class 2 molecules Proteins found on antigen presenting cells that present exogenous antigens to helper T cells. Antigen presenting cells Cells like dendritic cells, macrophages, and B cells that display antigens on MHC class 2 molecules. Endogenous antigens Antigens originating inside a target cell, often from intracellular pathogens like viruses. Exogenous antigens Antigens originating outside a target cell, processed and presented by antigen presenting cells. Apoptosis Programmed cell death induced by cytotoxic T cells to eliminate infected host cells. CD8 marker Surface protein on cytotoxic T cells that allows recognition of MHC class 1 molecules. CD4 marker Surface protein on helper T cells that allows recognition of MHC class 2 molecules. Immune response The body's defense mechanism activated by harmful antigens to eliminate pathogens. T lymphocytes White blood cells that play a central role in cell-mediated immunity, including cytotoxic and helper T cells. Dendritic cells Antigen presenting cells that process antigens and present them to T cells to initiate an immune response. Macrophages Antigen presenting cells that engulf pathogens and present antigens to helper T cells. B cells Lymphocytes that can present antigens to helper T cells and produce antibodies as part of the immune response.
4:27
