Cytokines serve what primary function in the immune response?

Cytokines play a crucial role in the immune response primarily by acting as signaling molecules that help to coordinate and regulate the activities of immune cells. They are produced by various cells within the immune system and are essential for communication between these cells. When an infection or injury occurs, cytokines are released to alert and recruit other immune cells to the site of the problem. This signaling helps to enhance the immune response by promoting inflammation, attracting more immune cells to the affected area, and enabling the immune system to respond effectively to pathogens or tissue damage.

This function of cytokines is vital because without these signals, immune cells may not be directed to the right location or activated at the right time, leading to an inadequate immune response. Cytokines essentially orchestrate the immune response, ensuring that the appropriate cells are mobilized quickly to fight infections or heal injuries.