A student carried out an experiment comparing the action of lipase on its own with the action of both lipase and bile salts on lipid digestion over time - Leaving Cert Biology - Question 6 - 2022
Question 6
A student carried out an experiment comparing the action of lipase on its own with the action of both lipase and bile salts on lipid digestion over time. The graph b... show full transcript
Worked Solution & Example Answer:A student carried out an experiment comparing the action of lipase on its own with the action of both lipase and bile salts on lipid digestion over time - Leaving Cert Biology - Question 6 - 2022
Step 1
What conclusion could the student make about lipid digestion based on the graph of results shown above?
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Answer
The student could conclude that lipid digestion is faster when both lipase and bile salts are present, as indicated by the steeper curve in the graph compared to the curve for lipase alone. This shows that the combination of these two substances enhances lipid digestion.
Step 2
Name the two products of complete lipid digestion by lipase.
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Answer
Fatty acids
Glycerol
Step 3
Name a location in the digestive system where lipase digests lipids.
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Duodenum (or jejunum or ileum or small intestine or stomach)
Step 4
Suggest an optimum pH for digestion of lipids in the location you named at part (c) above.
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7-9 (matched to small intestine)
Step 5
Describe the action of bile salts on lipids.
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Bile salts emulsify lipids, which increases their surface area, making them more accessible to lipase for digestion.
Step 6
Name the structure inside each villus that absorbs the products of lipid digestion.
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Answer
Lacteal
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