Final answer:
Macrophages are indeed scattered throughout a lymph node and are crucial for removing pathogens and presenting antigens to lymphocytes, thus aiding in adaptive immune responses.
Step-by-step explanation:
The statement that macrophages are scattered throughout a lymph node is true.
Macrophages, along with T cells, B cells, and dendritic cells, play a crucial role in the immune response within lymph nodes.
Lymph nodes function as filters for the lymph, removing debris and pathogens.
Macrophages are key players in this process as they can internalize and destroy many of the pathogens that pass through the lymph nodes.
Furthermore, they act as antigen-presenting cells (APCs) that capture, process antigens, and present them to lymphocytes, triggering adaptive immune responses.