Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.
The hormones and neurotransmitters from the gastrointestinal tract that regulate the secretion of hormones by the pancreas (esp. insulin).
See also: axis
the relationship between insulin secretion and the entrance of a glucose load into the intestine. The response to a glucose meal taken orally is much greater than if the glucose is given intravenously.