Digestion - Organisation P2 Flashcards
1
Q
What’s the order in which digestion happens?
A
- Mouth
- Oesophagus/ Gullet
- Stomach
- Small intestine
- Large intestine
- Rectum
- Anus
2
Q
What 2 things does the stomach do?
A
- Produces protease enzyme = pepsin
- Produces hydrochloric acid - kills bacteria and to give the right phH for the protease enzymes to work (2 - acidic)
3
Q
What happens in the small intestine
A
- Absorption of food molecules into the bloodstream
- Produces amylase, protease and lipase
4
Q
What does the gall bladder do?
A
- It neutralises acid from the stomach
- It emulsifies fats it gives a bigger surface area for the enzymes to work on
- Bile is stored in the gall bladder
5
Q
Where is bile made?
A
In the liver
6
Q
Adaptations of villi
A
- It has villi which increase the surface area so digested food can be absorbed into the blood stream quickly
- Single layer of surface cells - nutrients have to diffuse a short distance
- Good blood supply - maintians the concentration graident
7
Q
What does the large intestine do?
A
Absorbs excess water from food
8
Q
What does the rectum do?
A
It stored faeces before they go through the anus
9
Q
What are the roles of the digestive system?
A
- Digestion - breaking down large food molecules into smaller molecules
- Absorption - absorbing small molecules into the body
10
Q
What does chewing food do?
A
- Makes food easier to swallow
- Increases surface area for ezymes to act on
11
Q
What happens in the mouth?
A
Food is chewed into smaller pieces and amylase is released from the salivary glands.
12
Q
Where is bile released into?
A
Small intestine
13
Q
A
