The Small Intestine Flashcards
What are the three sections of the small intestine?
Duodenum
Jejunum
Ileum
Which part of the stomach does the duodenum attach to?
Pylorus
Why is duodenum so-called? Duodenum meaning 12
Because it is about as long as the width of 12 fingers
Why is the jejunum so called?
Because it is empty at death
What does Ileum mean?
Twisted
Which part of the abdomen is the jejunum?
Left upper quadrant
Which part of the abdomen is the ileum?
Right lower quadrant
Which sphincter seperates the small intestine from the large intestine?
ileocecal sphincter
List the functions of the small intestine.
1) Segmentations mix chyme with digestive juices and bring food into contact with mucosa for absorption.
2) Completes digestion of carbs (starches), proteins and lipids. Begins and completes nucleic acid digestion.
3) Absorbs 90% of nutrients and water
What are the intestinal glands found in the mucosa of the small intestine?
Deep crevices
lined by epithelial cells
secrete intestinal juice
What function do the goblet cells found in epithelium lining the small intestine perform?
Secrete mucous
What function do the absorptive cells found in the epithelium of the small intestinal mucosa perform?
Secrete enzymes to chemically digest food.
What are the 3 types of endocrine cells found in the intestinal glands in the small intestine?
S Cells
CCK cells
K cells
What do the duodenal glands secrete?
Alkaline mucous
What function does alkaline mucous produced in the duodenum perform?
neutralises gastric acid in the chyme
