<prompt> The MOST abundant source of ghrelin is:Gastric fundusGastric bodyGastric pylorusFirst pa of duodenum  <response>: Ghrelin is a 28 amino acid peptide mainly secreted from stomach and the most abundant source is gastric fundus. It also produced from intestine, pancreas, pituitary, kidney, placenta. ACTION: It increases growth hormone secretion It increases food intake It increases weight gain Ref: Sleisenger and Fordtrans, Edition-9, Page-8. 