Medical Laboratory Scientist (MLS) ASCP Practice Exam

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What is the primary role of Cytotoxic T cells?

Regulating immune responses

Destruction of tumor and virus-infected cells

Cytotoxic T cells, also known as CD8+ T cells, have a primary role in directly targeting and destroying cells that are infected by viruses as well as cancerous cells. This function is crucial for immune defense, as they recognize and bind to specific antigens presented on the surface of infected or malignant cells. Once activated, cytotoxic T cells release cytotoxic granules containing enzymes like perforin and granzymes, which induce apoptosis (programmed cell death) in the affected cells.

This ability to eliminate infected or transformed cells is a fundamental aspect of the adaptive immune response, making cytotoxic T cells essential in controlling viral infections and preventing the proliferation of tumors. Their action not only helps in clearing infections but also contributes to the overall immunological memory that helps the body respond more efficiently to future exposures to similar pathogens.

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Producing antibodies

Facilitating the production of immune memory

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