Figure 4 shows the human digestive system - AQA - GCSE Biology - Question 6 - 2018 - Paper 1
Question 6
Figure 4 shows the human digestive system.
Figure 4
06.1 Label the stomach and pancreas on Figure 4.
Many people suffer from stomach ulcers caused by a species of... show full transcript
Worked Solution & Example Answer:Figure 4 shows the human digestive system - AQA - GCSE Biology - Question 6 - 2018 - Paper 1
Step 1
Label the stomach and pancreas on Figure 4.
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Answer
The stomach and pancreas should be correctly labeled in Figure 4 as per their anatomical positions.
Step 2
Suggest how an infection with Helicobacter pylori might result in a stomach ulcer developing.
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Answer
An infection with Helicobacter pylori can lead to stomach ulcers because the bacteria are not killed by stomach acid (HCl), enabling them to damage the protective mucus lining of the stomach. This damage allows for the bacteria to infect the stomach tissue and cause an ulcer.
Step 3
Describe how a person infected with Helicobacter pylori could also develop liver cancer.
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Answer
If the cancer is malignant, cancer cells from the stomach can spread to other organs via the bloodstream, potentially affecting the liver and leading to liver cancer.
Step 4
Describe the test you would use to find out if protein is present in food:
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The Biuret test can be used to determine the presence of protein in food. To conduct this test, add Biuret reagent to the food sample. A mauve or purple color indicates that protein is present.
Step 5
Suggest why a person with coeliac disease might have this symptom.
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A person with coeliac disease might experience poor growth due to damage to the lining of the small intestine, which reduces the surface area available for nutrient absorption, leading to deficiencies in essential nutrients and energy.
