True or False: An autocrine action occurs when a hormone affects the cells that released it.

The statement is true because autocrine signaling refers to the process where a cell releases a hormone or signaling molecule that binds to receptors on its own surface, thus affecting its own function or activity. This type of signaling is crucial in various physiological processes, including immune responses and cell growth regulation. For example, in the immune system, certain lymphocytes may release cytokines that act on themselves to enhance their proliferation or differentiation. This self-regulating mechanism helps maintain homeostasis and allows cells to respond to changes in their internal or external environment effectively.