Multiple Choice
How do helper T-cells and cytotoxic T-cells work together in the immune response?
21. The Immune System
Review of Cytotoxic vs Helper T Cells
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What is the role of helper T cells in the adaptive immune response?
A
They activate B cells and cytotoxic T cells.
B
They produce antibodies to neutralize pathogens.
C
They directly kill infected host cells.
D
They suppress the immune response to prevent autoimmunity.
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Helper T cells, also known as CD4+ T cells, play a crucial role in the adaptive immune response by coordinating the activity of other immune cells.
When a helper T cell recognizes an antigen presented by an antigen-presenting cell (APC), it becomes activated and begins to secrete cytokines.
These cytokines are signaling molecules that help activate B cells, which are responsible for producing antibodies that target specific pathogens.
Helper T cells also assist in the activation of cytotoxic T cells (CD8+ T cells), which directly kill infected host cells by recognizing and binding to antigens presented on their surface.
Additionally, helper T cells can modulate the immune response to prevent excessive activation, which could lead to autoimmunity, by promoting regulatory pathways.
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