The Digestive System

Question 1

What are the four layers of the GI tract?

Answer 1

Mucosa, submucosa, muscularis (2 layers everywhere but the stomach, which is 3 layers), serosa

Question 2

Serosa

Answer 2

Visceral peritoneum that is everywhere except the superior esophagus and the inferior rectum.

Question 3

Muscularis

Answer 3

Smooth muscle, 2 layers everywhere but the stomach, which has 3 layers

Question 4

Mucosa

Answer 4

Innermost layer that secretes mucus in the esophagus and anus and digestive juices

Question 5

Submucosa

Answer 5

Neurovascular layer

Question 6

When does the pharynx become the esophagus?

Answer 6

C6

Question 7

Muscle of the esophagus

Answer 7

Superior half- skeletal. Inferior half- smooth

Question 8

Where is the site of most absorption of nutrients in the GI tract?

Answer 8

Small intestine (jejunum)

Question 9

Where are plica circulares?

Answer 9

Small intestine

Question 10

Where do the small and large intestines meet?

Answer 10

Ileocecal junction

Question 11

Where does water reabsorption occur?

Answer 11

Large intestine