Lecture 20

Question 1

What are the functions of the GI system

Answer 1

1. Motility
2. Secretion
3. Digestion
4. Absorption

Question 2

Epithelium in the stomach, small and large intestine

Answer 2

Simple columnar epithelium.

Question 3

Four layers of the gut tube

Answer 3

1. Mucosa
2. Submucosa
3. Muscularis (externa/proper) - contains smooth muscle
4. Adventitia - Layer of connective tissue

Question 4

The mucosa consists of the…

Answer 4

1. Epithelium
2. Lamina propria (FCT)
3. Muscularis Mucosae

Question 5

What does the submucosa contain?

Answer 5

Glands and blood vessels

Question 6

What is submucosa regulated by?

Answer 6

Submucosal nerve plexus

Question 7

Which system is the submucosal nerve plexus part of?

Answer 7

Enteric nervous system

Question 8

Where is the myenteric plexus located?

Answer 8

In between muscle layers

Question 9

What type of membrane is the peritoneum?

Answer 9

Serous membrane

Question 10

What does the parietal layer line?

Answer 10

The body wall

Question 11

What does the visceral layer line?

Answer 11

The organs

Question 12

Where is the retroperitoneal?

Answer 12

Posterior to the peritoneum

Question 13

What is the mesentery

Answer 13

Double layer of visceral peritoneum that connects organ to body wall

Question 14

What are the omenta

Answer 14

Double layer of visceral peritoneum that connects an organ to another organ

Question 15

What are the 3 pairs of salivary glands connected to the oral cavity

Answer 15

• Parotid
• Sublingual
• Submandibular

Question 16

What do acinar cells secrete?

Answer 16

enzymes - amylase

Question 17

What do duct cells secrete?

Answer 17

Biocarbonate (buffering)

Question 18

Where is the esophagus located

Answer 18

Posterior to the trachea, extends from the pharynx to the stomach