Question
(a) Fig. 1.1 is a diagram of the human digestive system.
Use the letters from Fig. 1.1 to complete Table 1.1 to give the part of the human digestive
system that is identified by each function.
Write one letter only in each box. You may use the same letter more than once. There are some
letters that you will not use. The first one has been done for you.
The human diet provides nutrients for the synthesis of biological molecules that make up
cells, cell products and tissues.
(b) (i) Complete Table 1.2 to show the nutrients that are absorbed from food to
synthesise the large molecules listed.
(ii) Mineral ions are required in the human diet in small quantities.
State the mineral ion required for each process:
(iii) State another type of nutrient required in the human diet in small quantities.
(c) One role of nutrients is to provide materials for the repair of damaged tissues.
Fig. 1.2 shows the events that happen after a cut to the skin.
Use the information in Fig. 1.2 to describe what happens to seal the wound in the skin
and repair the skin tissue.
Answer/Explanation
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Question
(a) Fig. 4.1 shows the four different types of human teeth.
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(b) Teeth can develop dental decay.
(i) Explain how dental decay is caused.
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(ii) Describe two ways to avoid dental decay.
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Answer/Explanation
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