Final answer:
In Biology, professional antigen presenting cells (APCs) can be macrophages or dendritic cells. These cells play a crucial role in the immune response by stimulating T cells and presenting antigens to other immune cells.
Step-by-step explanation:
In the field of biology, professional antigen presenting cells (APCs) can be macrophages or dendritic cells. Macrophages stimulate T cells to release cytokines that enhance phagocytosis, while dendritic cells bring antigens to regional draining lymph nodes. Both macrophages and dendritic cells function as APCs in the immune system.