Question

Which of the following pertains to T-cells?

• A. Stimulate antibody production by B-cells
• B. Have cell-mediated immunity
• C. Have specific receptors
• D. All of these

Answer 1

Answer: (D)

All of these

• A T cell is a type of lymphocyte that develops in the thymus gland and plays a central role in the immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor on the cell surface.
• The helper T-cells stimulate antibody production by B-cells by activating them.
• Cell-mediated immune responses involve the destruction of infected cells by cytotoxic T cells or the destruction of intracellular pathogens by macrophages. The activation of naive T cells in response to antigen, and their subsequent proliferation and differentiation constitutes a primary immune response.
  
• The T-cell receptor is a molecule found on the surface of T cells. These receptors possess unique antigen specificity, determined by the structure of the antigen-binding site on them. So all three given options are true regarding T-cells.