a substance that influences a gland (in this case, the pituitary gland) to secrete its hormones

a substance that stimulates the pituitary gland to produce hGH

A substance which stimulates secretion (as by the stomach or the pancreas).

Affects immune system and reactivity due to its ability to promote or stimulate secretion.

Agent promoting secretion.

Substance that induces secretion from cells, originally applied to peptides inducing gastric and pancreatic secretion.

A secretagogue is a substance which causes another substance to be secreted. One example is gastrin,, which stimulates secretion of gastric acid by the stomach.