Cytokine Communication in Immune Response

Which type of cells secrete cytokines?

What is the function of cytokines in the immune system?

What is the role of cytokines in intercellular communication among immune cells?

Are cytokines stored or secreted?

What is the main function of cytokines in the immune system?

True or false: Cytokines are large proteins that bind to and activate receptors located on target cells.

True or false: Cytokines do not play a role in coordinating immune responses.

True or false: Cytokine secretion is a prolonged, continuous event.

True or false: Cytokines are only secreted by immune system cells.

True or false: Cytokines always have a protective effect on the host.

Produced by many immune and nonimmune cells, all ______ are small proteins that bind to and activate receptors located on target cells and low molecular weight. Cytokine secretion (not stored) is a brief, self-limited event. Cytokines link the components of the immune system together. They are the chemical communication network that allows different immune system cells to “talk” to one another. This is called cross talk, and it is essential for the precise timing of the functions of the immune system. Most ______ are secreted by more than one type of immune system cell and also by certain nonimmune cells (for example, by endothelial cells and fibroblasts). Cytokines may have both protective and deleterious effects on the host.