GI Simple Stomach

Question 1

3 Types of Glands in the Simple Stomach

Answer 1

• Cardiac Glands
• Fundic Glands
• Pyloric Glands

Question 2

Purpose of Ruggae in the Simple Stomach

Answer 2

• Line the interior surface of the body and fundus
• Increases contractility of the stomach
• Faces the lumen of the stomach

Question 3

The Layers of the Wall of the Simple Stomach

Answer 3

Thick smooth muscle layers (exterior to interior):

• Longitudinal muscle layer
• Circular muscle layer
• Oblique muscle layer

Allows for movement in all directions

Question 4

Serosa

Answer 4

• Secretes serous fluid from the mesothelium
  
  • Lubricant
• Covers the longitudinal muscle layer of the wall of the simple stomach
• Exterior layer

Question 5

Serosa vs. Adventitia

Answer 5

Serosa:

• Functions as a lubricant
• Secretes serous fluid from the mesothelium

Adventitia:

• Doesn’t secrete fluid
• Main function is to hold structures

Question 6

Gastric (Fundic) Glands

Answer 6

• Extensive
• Long, tubular
• 3-7 of the glands open into the bottom of a pit
• Secrete acid and enzymes
• Long and straight
  
  • Extend into the lamina proprina
• Secrete 4 Cell Types:
  
  • Chief Cells
  • Parietal Cells
  • Mucus Neck Cells
  • Enteroendocrine Cells

Question 7

Type of Epithelium Lining the Esophagus

Answer 7

• Stratified Squamous Epithelium

Question 8

Type of Epithelium Lining the Stomach

Answer 8

• Simple Columnar Epithelium

Question 9

Identify the Layers of the Stomach

Answer 9

• Mucosa
  
  • Gastric Glands
  • Muscularis Mucosa
  • Lamina Proprina
• Submucosa
  
  • Blood Vessels
• Muscularis
  
  • Oblique
  • Circular
  • Longitudinal
• Serosa
  
  • Connective Tissue

Question 10

Layers of the Esophagus

Answer 10

• Mucosa
• Submucosa
  
  • Sero/mucus glands
• Muscularis Externa
• Adventitia