Which lymphocytes leave secondary lymphatic tissue to go to the site of infection?

Which lymphocytes leave secondary lymphatic tissue to go to the site of infection?

• A. B cells only
• B. T cells only
• C. Both B and T cells
• D. NK cells

Answer: (B)

T cells play a crucial role in the immune response, particularly in recognizing and responding to infected or abnormal cells. When an infection occurs, T cells that have been activated in secondary lymphatic tissues, such as lymph nodes or the spleen, leave these sites to migrate to the area of infection. They are essential for direct cell-mediated immunity, targeting infected cells, and helping regulate the activity of other immune cells.

While B cells are also key players in the immune response, particularly in the production of antibodies, their primary function is to remain in the lymphatic tissues or circulate through the blood and lymphatic system to produce antibodies rather than migrate directly to sites of infection. Activated B cells can differentiate into plasma cells that secrete antibodies into circulation but do not generally leave lymphatic tissue in the same way T cells do.

Natural Killer (NK) cells are another type of lymphocyte involved in the innate immune response. They can also migrate to sites of infection but are not categorized in the same way during the examination of lymphocyte movement from secondary lymphatic tissues specifically; that role is primarily attributed to T cells.

Thus, the correct answer focuses on the specific function of T cells in responding to infections by migrating from secondary lymphatic tissues directly to the affected