Digestion: Stomach 3 Flashcards
1
Q
What do nerves in the submucosa detect? What do they initiate the release of when what they are detecting food is present?
A
- Nerves in the submucosa detect when food is present.
- They initiate the release of gastrin (hormone).
2
Q
Where is gastrin released? What does it target to release?
A
It is released into the bloodstream, where it targets gastric cells to release gastric juices (2 L/day).
3
Q
What does gastrin allow for?
A
It allows the stomach to reach pH range from 2.0 to 3.0.
4
Q
What does gastrin do?
A
Inhibits amylase, but provides pH for activation of pepsinogen.
5
Q
What is activated?
A
Pepsin (enzyme).
6
Q
What does pepsin do?
A
It begins the breakdown of proteins into separate amino acids.
7
Q
What do nerve endings in the lining of the stomach do?
A
They are then stimulated to increase muscular contractions (to form chyme).
