Topic 15: Digestive System - Stomach Flashcards
1
Q
What are the four regions of the stomach?
A
- cardiac (cardia)
- Fundus
- Body
- Pyloric region (pylorus)
2
Q
What does the cardiac region of the stomach attach to?
A
- esophagus
3
Q
Where is the fundus?
A
- above esophageal entrance
4
Q
What does the pyloric region contain?
A
- PYLORIC SPHINCTER
5
Q
What kind of curvature does the stomach have?
A
- greater and lesser curvatures
6
Q
What does the stomach convert?
A
- converts food into chyme (food and gastric juices)
7
Q
In the stomach mucosa, what does invagination (turning in on itself) of epithelium form?
A
- exocrine gastric glands that secrete gastric juice to lumen
8
Q
What do gastric glands contain?
A
- chief cells
- parietal cells
- G cells
- Goblet cells
9
Q
What do chief cells secrete? (2)
A
- pepsinogen
- gastric lipase (enzymes)
10
Q
What do parietal cells secrete?
A
- HCl (pH 2)
11
Q
What do G cells (enteroendocrine cells) secrete?
A
- gastrin (hormone)
12
Q
Where are goblet cells also found?
A
- surface epithelium
13
Q
What is rugae?
A
- fold of the mucosa and submucosa due to contraction of the muscularis externa
14
Q
What does rugae allow for?
A
- expansion without tearing
15
Q
What is the function of the muscularis externa?
A
churning
