Basic Structure/Function of the GI Tract

Question 1

Gastric refers to?

Answer 1

Stomach

Question 2

Enteric refers to?

Answer 2

Intestines

Question 3

What is the innermost layer of the GI tract wall?

Answer 3

Mucosa

Question 4

What are the 3 parts of the mucosa layer?

Answer 4

Epithelium
Lamina Propria
Muscularis mucosae

Question 5

What is the last layer of the GI tract wall?

Answer 5

Serosa or Adventitia

Question 6

What is the difference between serosa and adventitia?

Answer 6

Depends on whether that part of GI tract is suspended from body cavity (serosa) or surrounded by other tissue (adventitia)

Question 7

What type of tissue makes up the serosa level?

Answer 7

Loose connective tissue

Question 8

What area of the GI tract can you find stratified squamous epithelium?

Answer 8

Mouth and anus

Question 9

What area of the GI tract can you find simple columnar epithelium?

Answer 9

The remainder of the GI tract

Question 10

• Located in the submucosa
• Controls secretions and blood flow in the GI tract

Answer 10

Submucosal Plexus

Question 11

What is another name for submucosal plexus?

Answer 11

Meissner’s Plexus

Question 12

• Runs between the circular and longitudinal layers of smooth muscle
• Important in controlling movements of the GI tract through local reflexes

Answer 12

Myenteric Plexus

Question 13

What is another name for myenteric plexus?

Answer 13

Auerbach’s plexus

Question 14

Which endocrine hormone inhibits gastric emptying?

Answer 14

CCK (Cholecystokinin)

Question 15

Which endocrine hormone stimulates stomach motility?

Answer 15

Gastrin

Question 16

How do endocrine hormones travel in the GI tract?

Answer 16

Secreted directly into the bloodstream; have their effect at a distant site