Anatomy and Physiology II Practice Test

Which type of blood cells are involved in both immune response and maturation in the thymus?

1. B Lymphocytes

2. T Lymphocytes

3. Neutrophils

4. Plasma cells

The correct answer is: T Lymphocytes

The involvement of T lymphocytes in both immune response and maturation in the thymus is fundamental to the study of the immune system. T lymphocytes, or T cells, originate from hematopoietic stem cells in the bone marrow but undergo maturation in the thymus. This maturation process is crucial as it enables T cells to develop specific receptors that allow them to recognize antigens. During their time in the thymus, T cells undergo selection processes to ensure that they can respond appropriately to pathogens without attacking the body’s own cells. Once matured, T cells play a significant role in the adaptive immune response, where they can assist in killing infected host cells, activating other immune cells, and regulating the immune response itself. In contrast, B lymphocytes primarily function in the production of antibodies in response to pathogens and do not mature in the thymus. Neutrophils are a type of white blood cell that play a critical role in the innate immune response and are not involved in the maturation of lymphocytes. Plasma cells are derived from B lymphocytes and secrete antibodies but do not have a direct role in thymic maturation or the broader immune response mechanisms attributed to T lymphocytes.