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Cytotoxic T-cells interact with target cells by recognizing A) foreign proteins only. B) MHC proteins only. C) foreign protein-MHC protein complexes. D) either foreign proteins or MHC proteins. E) neither foreign proteins nor MHC proteins.
The APC activates T helper cells (Th or CD4 cells) to secrete _______ as a co-stimulatory signal and CD8 cells to express ______ ___________. CD4 = secrete IL-2. CD8 = express IL-2 receptors. True or False. Once activated, CD8 T cells require a co-stimulation before they can perform their effector functions.
20 Σεπ 2023 · The response generated by T-cells is called a cell-mediated response. There are two classes of T-lymphocytes, helper and cytotoxic T-cells, also called CD4+ and CD8+ T-cells, respectively. Helper T-cells activate macrophages and cytotoxic cells and stimulate antibody synthesis in B lymphocytes.
Cytotoxic T-Cell Activity against Target Cells. Why do target cells trigger their own destruction? One of the functions of T-cells in the immune system is to attack and destroy infected cells. Target cells are cells that have been attacked by a virus.
Target cells are cells that have been attacked by a virus. The target cells present molecular information on their membranes that allow the cytotoxic T cells to identify and destroy them. Target cells have been taken over by a virus and do not have a good chance of surviving for long in any event.
View the animation below, then complete the quiz to test your knowledge of the concept. Cytotoxic T cells produce cytotoxins which cause apoptosis of infected cells. Self proteins of infected cells are not recognized by cytotoxic T cells.
