Final answer:
Cells that regulate the immune response are helper T (TH) cells, which guide the adaptive immunity, stimulate other immune cells, and contribute to both cellular and humoral responses.
Step-by-step explanation:
Cells that help regulate the immune response are helper T (TH) cells. Helper T cells are pivotal in the adaptive immune system because they not only control various immune responses but also direct B cell responses. These cells perform different functions tailored to stimulating both adaptive and innate immune defenses. Naïve CD4+ T cells interact with antigen-presenting cells (APCs) and become activated to TH lymphocytes, which then secrete cytokines that inform other cells of pathogens, and they assist B cells or cytotoxic T cells in a targeted immune response.