DP Biology Questionbank
D.2 Digestion
Description
| Nature of science: Serendipity and scientific discoveries—the role of gastric acid in digestion was established by William Beaumont while observing the process of digestion in an open wound caused by gunshot. (1.4) |
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Understandings:
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Utilization: Syllabus and cross-curricular links: Biology Topic 1.2 Ultrastructure of cells Topic 6.5 Neurons and synapses Chemistry Topic D4 pH regulation of stomach |
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20N.3.SL.TZ0.17b:
Explain how Helicobacter pylori can cause stomach ulcers.
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20N.3.SL.TZ0.17a:
The table shows the origin and function of gastric secretions in the digestive system.
Identify the missing items by completing the table.
- 20N.3.HL.TZ0.21a: Outline the function of the stomach in food digestion.
- 20N.3.HL.TZ0.21b: State a mechanism by which the stomach destroys pathogens.
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20N.3.HL.TZ0.21c.ii:
There are times when pathogenic bacteria infect the stomach, causing ulcers.
Explain how proton pump inhibitors (PPIs) reduce conditions that favour ulcer formation.
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17N.3.SL.TZ0.17c:
Other than gastric acidity, state a primary cause of stomach ulcers.
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17N.3.SL.TZ0.17b:
GI damage can include ulcers. Outline the treatment of stomach ulcers.
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18N.3.HL.TZ0.18e:
In order to compare the absorption of fat and of glucose in the digestive system, state in the table, using yes or no, whether the processes occur.
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19M.3.HL.TZ2.20b:
Compare and contrast the effect of adding antioxidants to nizatidine on the ulcer healing rate.
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19M.3.HL.TZ2.20a:
State the name of the bacterium that can cause stomach ulcers.
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