Home > Health A – Z > Secretin

Secretin

A hormone made in the duodenum that causes the stomach to make pepsin, the liver to make bile, and the pancreas to make digestive juices.

PubMed Health Glossary
(Source: NIH - National Institute of Diabetes and Digestive and Kidney Diseases)

Drawing of the small intestine showing the duodenum, jejunum, and ileum. Also shown are the stomach, appendix, colon, and rectum. Click to enlarge

The small intestine and nearby organs National Institutes of Health

About Secretin

A hormone released into the blood by cells in the inner layer of the small intestine. It is released when partly digested food moves from the stomach into the small intestine. Secretin causes the pancreas, liver, and stomach to release other substances that help digest food. Secretin may also be made in the laboratory. NIH - National Cancer Institute

Terms to know

Appendix
A 4-inch pouch attached to the cecum, the first part of the large intestine. The appendix's function, if any, is unknown.
Colon (Bowel)
The longest part of the large intestine, which is a tube-like organ connected to the small intestine at one end and the anus at the other. The colon removes water and some nutrients and electrolytes from partially digested food. The remaining material, solid waste called stool, moves through the colon to the rectum and leaves the body through the anus.
Duodenum
The first part of the small intestine that connects to the stomach.
Ileum
The lower end of the small intestine.
Jejunum
The middle section of the small intestine between the duodenum and ileum.
Liver
The largest abdominal organ. The liver carries out many important functions, such as making important blood proteins and bile, changing food into energy, and cleaning alcohol and poisons from the blood.
Pancreas
An organ that makes insulin and enzymes for digestion. The pancreas is located behind the lower part of the stomach and is about the size of a hand.
Rectum
The last several inches of the large intestine closest to the anus.
Secretin Stimulation Test
A test used to help diagnose problems in the pancreas, such as gastrinomas and pancreatitis. It measures the ability of the pancreas to respond to the hormone secretin (a hormone that causes other substances to be released by the stomach, liver, and pancreas).
Small Intestine
The organ where most digestion occurs. It measures about 20 feet and includes the duodenum, jejunum, and ileum.
Stomach
An organ that is part of the digestive system. The stomach helps digest food by mixing it with digestive juices and churning it into a thin liquid.

Terms to know

Appendix
A 4-inch pouch attached to the cecum, the first part of the large intestine. The appendix's function, if any,...
Colon (Bowel)
The longest part of the large intestine, which is a tube-like organ connected to the small intestine at one e...
Duodenum
The first part of the small intestine that connects to the stomach....
See all 11

PubMed Health Blog...

read all...