Question

Dendritic cells function as a link between the innate and adaptive immune systems. Which class of cells activate naive T cells?

1) B cells
2) Macrophages
3) Dendritic cells
4) Effector T cells

Answer 1

Dendritic cells are professional antigen-presenting cells that activate naive T cells by presenting antigens to them.

Step-by-step explanation:

Naïve CD4+ T cells engage MHC II molecules on antigen-presenting cells (APCs) and become activated. Clones of the activated helper T cell, in turn, activate B cells and CD8+ T cells, which become cytotoxic T cells.

Dendritic cells are immune cells that process antigen material and are known as professional antigen-presenting cells. They play a crucial role in activating naive T cells by presenting antigens to them.