The Small Intestine Flashcards Preview

Anatomy & Physiology > The Small Intestine > Flashcards

Flashcards in The Small Intestine Deck (16):
1

What are the three sections of the small intestine?

Duodenum
Jejunum
Ileum

2

Which part of the stomach does the duodenum attach to?

Pylorus

3

Why is duodenum so-called? Duodenum meaning 12

Because it is about as long as the width of 12 fingers

4

Why is the jejunum so called?

Because it is empty at death

5

What does Ileum mean?

Twisted

6

Which part of the abdomen is the jejunum?

Left upper quadrant

7

Which part of the abdomen is the ileum?

Right lower quadrant

8

Which sphincter seperates the small intestine from the large intestine?

ileocecal sphincter

9

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

10

What are the intestinal glands found in the mucosa of the small intestine?

Deep crevices
lined by epithelial cells
secrete intestinal juice

11

What function do the goblet cells found in epithelium lining the small intestine perform?

Secrete mucous

12

What function do the absorptive cells found in the epithelium of the small intestinal mucosa perform?

Secrete enzymes to chemically digest food.

13

What are the 3 types of endocrine cells found in the intestinal glands in the small intestine?

S Cells
CCK cells
K cells

14

What do the duodenal glands secrete?

Alkaline mucous

15

What function does alkaline mucous produced in the duodenum perform?

neutralises gastric acid in the chyme

16

What are circular folds

Permanent ridges of the mucosa and sub-mucosa that enhance absorption - cause chyme to spiral