Following are gastrointestinal hormones except
**Core Concept**
Gastrointestinal hormones are a group of peptides and amines secreted by the gastrointestinal tract that play crucial roles in regulating digestion, absorption, and gut motility. These hormones are released in response to food intake and help to coordinate the various physiological processes involved in digestion and nutrient absorption.
**Why the Correct Answer is Right**
The correct answer is a hormone that is not typically associated with the gastrointestinal system. The gastrointestinal system is primarily regulated by hormones such as gastrin, secretin, cholecystokinin (CCK), gastric inhibitory polypeptide (GIP), and motilin. However, other hormones such as adrenaline (epinephrine) and cortisol are not typically classified as gastrointestinal hormones.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is a gastrointestinal hormone involved in regulating gastric acid secretion and is not the correct answer.
**Option B:** This option is a hormone that is secreted by the pancreas in response to meals and helps to regulate glucose metabolism, but it is not the correct answer.
**Option C:** This option is a hormone that is secreted by the stomach and helps to regulate gastric motility and emptying, but it is not the correct answer.
**Clinical Pearl / High-Yield Fact**
Remember that gastrointestinal hormones play a critical role in regulating digestion and absorption, and dysregulation of these hormones can lead to various gastrointestinal disorders, such as gastroparesis and malabsorption.
**Correct Answer:**
D. Adrenaline (epinephrine)