Answer
Histamine produced by mast cells in the lamina propria is a paracrine that stimulates HCL secretion.
Work Step by Step
Histamine, secreted from mast cells, stimulates hydrochloric acid secretion. However, it is not the only HCL stimulus. Other influences that promote gastric HCL secretion include acetylcholine(ACH) of prasympathetic neurons and gastrin of G cells.