A<unk>  is a substance that causes another substance to be secreted. One example is gastrin, which stimulates the H/K ATPase in the parietal cells (increased gastric acid production by the stomach). Pentagastrin, a synthetic gastrin, histamine, and acetylcholine are also gastric<unk> s. Insulin<unk> s, such as sulfonylureas, trigger insulin release by direct action on the KATP channel of the pancreatic beta cells. Blockage of this channel leads to depolarization and secretion of vesicles. Angiotensin II is a<unk>  for aldosterone from the adrenal gland.
Secretagogue
Cholagogue
Immunostimulant
Depressogen
Chaotropic agent
Antifungal
Antiparasitic
Antisialagogue