(a) State two functions of the large intestine. [2] (b) Explain why dietary fibre is important for the healthy functioning of the large intestine. [3]
Question 1 Report
(a) State two functions of the large intestine. [2]
(b) Explain why dietary fibre is important for the healthy functioning of the large intestine. [3]
Answer Details
(a) State two functions of the large intestine. [2]
One mark each (max 2):
- Absorbs water from the remaining food waste (1)
- Forms and stores faeces (solid waste) until they are removed from the body (1)
- Absorbs some vitamins produced by bacteria in the large intestine (1)
(b) Explain why dietary fibre is important for the large intestine. [3]
One mark for each valid point (max 3):
- Dietary fibre absorbs water in the large intestine, making the faeces soft and bulky (1)
- This bulk helps the muscles of the intestine wall to push the waste along more easily (peristalsis) (1)
- Without enough fibre, the waste moves slowly, which can cause constipation and may increase the risk of bowel disease (1)
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