Stimulation of a cell by a molecule that the cell itself makes is called

stimulation

Autocrine stimulation

Explanation:

In autocrine signaling, the cell produces ligands that are also able to bind receptors on its surface. This is different from paracrine signaling whereby a ligand produced by a cell does not bind its surface receptors but does so on other cell types. These two types of signaling are important for the development of an organism.