1a
4 marks
Fig. 1 is a photomicrograph showing a surface view of many villi in the small intestine.
Fig. 1
(i) State the function of villi.
[1]
(ii) Describe the structure of a villus.
[3]
1b
4 marks
(i) Blood transports nutrients.
State the component of the blood that transports nutrients.
[1]
(ii) The nutrients in the blood can be used to become part of cells.
State the name of this process.
[1]
(iii) Amino acids are used to make proteins.
State two examples of proteins that are found in the blood.
[2]
1c
4 marks
Explain the effect of cholera bacteria on the digestive system.
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