Paper 1 H - SAMPLE SET 1 Q6
6) Figure 4 shows the human digestive system.
6.1) Label the stomach and pancreas on Figure 4. [1 mark]
Many people suffer from stomach ulcers caused by a species of bacteria called Helicobacter pylori.
The stomach is lined with a protective lining of mucus.
Helicobacter pylori are acid-tolerant bacteria which can damage this mucus lining.
6.2) Suggest how an infection with Helicobacter pylori might result in a stomach ulcer developing. [2 marks]
6.3) Helicobacter pylori can also cause stomach cancer. Describe how a person infected with Helicobacter pylori could also develop liver cancer. [3 marks]
6.4) Gluten is a form of protein found in some grains.
Describe the test you would use to find out if protein is present in food. [2 marks]
6.5) Coeliac disease is a disease of the digestive system.
It damages the lining of the small intestine when foods that contain gluten are eaten.
When people with coeliac disease eat foods that contain gluten:
Symptoms of coeliac disease include poor growth.
Suggest why a person with coeliac disease might have this symptom. [4 marks]
(Total for Question 6 = 12 marks)
Many people suffer from stomach ulcers caused by a species of bacteria called Helicobacter pylori.
The stomach is lined with a protective lining of mucus.
Helicobacter pylori are acid-tolerant bacteria which can damage this mucus lining.
6.2) Suggest how an infection with Helicobacter pylori might result in a stomach ulcer developing. [2 marks]
6.3) Helicobacter pylori can also cause stomach cancer. Describe how a person infected with Helicobacter pylori could also develop liver cancer. [3 marks]
6.4) Gluten is a form of protein found in some grains.
Describe the test you would use to find out if protein is present in food. [2 marks]
6.5) Coeliac disease is a disease of the digestive system.
It damages the lining of the small intestine when foods that contain gluten are eaten.
When people with coeliac disease eat foods that contain gluten:
- their immune system forms antibodies to gluten
- these antibodies attack the lining of the small intestine
- this causes inflammation in the intestines and damages the villi.
Symptoms of coeliac disease include poor growth.
Suggest why a person with coeliac disease might have this symptom. [4 marks]
(Total for Question 6 = 12 marks)