Below is a chart of the 5 GI peptides involved in GI motility. Research the actions of these peptides and list their effects in the chart below. Again your textbook will have information on these peptides. Five GI hormones and their effects:
Hormone Effect
Gastrin
From G cells in the pyloric antrum
Cholecystokinin (CCK)
From I cells in the duodenum and jejunum
Secretin
From S cells in the duodenum
Glucose Dependent Insulinotropic Peptide (GIP)
From cells in the duodenum and proximal jejunum
Motilin
From cells in the duodenum and jejunum; released about every 90 minutes during the post-absorptive state