Revision Session Flashcards
1
Q
What are the functions of GI tract?
A
- Ingestion
- Mechanical processing
- Digestion
- secretion
- absorption
- Excretion
2
Q
What is ingestion?
A
Occurs when materials enter digestive tract via mouth.
3
Q
what is the gut controlled by?
A
autonomic nervous system
4
Q
what does ANS do ?
A
modulates the response
5
Q
what are the roles of saliva?
A
- Lubrication
- Facilitation of taste
- Protection against acid and bacteria
- Digestion
6
Q
what does pyloric sphincter do?
A
control the amount of food released into small intestine
7
Q
What is vomiting controlled by?
A
area postrema= chemoreceptor trigger
8
Q
what are the consequences of vomiting?
A
- salivation
9
Q
what is CCK screted by?
A
by I cells of small intestine
10
Q
What secretes peptide hormone?
A
S cells
11
Q
what does bile do?
A
bind to fat droplets (emulsify)
12
Q
what happens as bile flows along bile duct?
A
bicarbonate , salt and water are added
