Proliferation of T-cells in response to antigen presentation is accompanied by enlargement of a. lymph nodes b. Thymus c. size of antibody d. size of B-cell Clear my choice

The correct answer is a. lymph nodes.<br /><br />When T-cells proliferate in response to antigen presentation, it is accompanied by the enlargement of lymph nodes. Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They play a crucial role in the immune response by filtering lymph fluid and trapping foreign particles, such as bacteria and viruses. When an antigen (a substance that triggers an immune response) is detected, T-cells in the lymph nodes become activated and start to divide and proliferate. This proliferation of T-cells leads to the enlargement of the lymph nodes, which is a common sign of an active immune response.<br /><br />Option b, Thymus, is not the correct answer. The thymus is an organ located in the chest where T-cells mature, but it does not enlarge during T-cell proliferation in response to antigen presentation.<br /><br />Option c, size of antibody, is not the correct answer. The size of an antibody does not change during T-cell proliferation in response to antigen presentation.<br /><br />Option d, size of B-cell, is not the correct answer. The size of a B-cell does not change during T-cell proliferation in response to antigen presentation.