O-LevelBiologyHuman Nutrition5090/22 · May/June 2021 · Q56 Marks
The diagram shows villi in the small intestine. [Figure 5.1]
- Outline the processes by which named molecules are absorbed from the contents of the small intestine into the blood. [6][6]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.
- [6] 1 water + osmosis / diffusion ;
- [6] 2 glucose / amino acids / fatty acids / glycerol + diffusion ;
- [6] 3 glucose + active transport ;
- [6] 4 correct ref. to a concentration gradient ;
- [6] 5 correct ref. to energy requirement ;
- [6] 6 through + membrane / epithelium ;
- [6] 7 tissue fluid / capillaries / plasma ;
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