Final answer:
Activated helper T cells release cytokines and interleukins to stimulate other immune cells. These substances help coordinate and strengthen the immune response.
Step-by-step explanation:
Activated helper T cells release cytokines and interleukins to stimulate other immune cells. Cytokines are small proteins that act as chemical messengers, facilitating communication between immune cells. Interleukins are a specific type of cytokine that regulate immune responses, promoting cell growth and differentiation. These released substances help coordinate and strengthen the immune response by activating other immune cells to target and destroy pathogens.