Gastric secretion is increased by all except
Gastrin, histamine, and acetylcholine are the 3 agonists of the parietal cells.Gastrin and acetylcholine promote secretion by elevating cytosolic free calcium concentration.Histamine increases intracellular cAMP.Both this pathways together have more than additive effect on secretion rates Ref: Ganong&;s Review of medical physiology, 23 rd edition, page 434
Histamine
Acetylcholine
Gastrin
HCI
G.I.T