Oesophagus and Stomach Flashcards
1
Q
What are the different layers/sections of the GI tract (4)
A
Mucosa
Submucosa
Muscularis
Serosa
2
Q
What’s the role of oesophagus
A
Convey food to the stomach
3
Q
Meaning of peristalsis
A
Process by which food is moved along oesophagus to stomach
4
Q
What muscles are involved in peristalsis + function
A
Circular - Squeeze and expand to push food through
Longitudinal - shorten and propel food forward
5
Q
What are the 4 regions of the stomach
A
Cardia
Fundus
Corpus
Pylorus
6
Q
Where is HCl released from
A
Parietal cells
7
Q
Where is pepsin released from
A
Chief cells
8
Q
What’s the inactive enzyme of pepsin
A
Precursor pepsinogen
9
Q
Why is enzyme released in an inactive form
A
Prevents autodigestion
10
Q
Meaning of zymogen
A
Inactive protein precursor of an enzyme
11
Q
What activates pepsinogen
A
HCl
