In the cell-mediated immune response, T cells secrete ________, which activate additional components of the immune system.

A) antibodies
B) complement
C) collagen
D) cytokines
E) histamine

Cytokines

Signaling molecules secreted by cells that have an effect on the behavior of cells, involved in immune responses, inflammation, and the healing process.

Cell-mediated Immune Response

The branch of the immune response that involves the activation of T-cells and the direct destruction of infected cells.

T cells

A type of lymphocyte developed in the thymus, crucial for the adaptive immune response, playing roles in cell-mediated immunity and the activation of other immune cells.