What is the role of T cells in the immune system?

• A. To produce antibodies and neutralize pathogens
• B. To mediate cell-mediated immunity and assist other immune cells
• C. To stimulate inflammation and recruit other immune cells
• D. To form barriers against infection

Answer: (B)

The role of T cells in the immune system is primarily centered on their function in cell-mediated immunity and their ability to assist other immune cells. T cells are a type of lymphocyte critical for adaptive immunity. They do not produce antibodies like B cells but instead directly interact with infected or abnormal cells.

One of the main subsets of T cells, known as cytotoxic T cells, can recognize and destroy infected cells, highlighting their importance in controlling intracellular pathogens, such as viruses. Another subset, helper T cells, plays a supportive role by secreting cytokines that activate and regulate the activity of other immune cells, including B cells and macrophages. This coordination is essential for a well-orchestrated immune response.

Their ability to mediate these interactions makes T cells central to sustaining an effective immune defense, enhancing the overall responsiveness and adaptability of the immune system. This distinctly positions them as essential players in both direct pathogen elimination and the modulation of the broader immune response.