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Food high in saturated fat can raise blood cholesterol levels - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Question 2
Food high in saturated fat can raise blood cholesterol levels. Complete the sentence by putting a cross (X) in the box next to your answer. The enzymes for fat dig... show full transcript
Worked Solution & Example Answer:Food high in saturated fat can raise blood cholesterol levels - Edexcel - GCSE Biology - Question 2 - 2013 - Paper 1
Step 1
Step 2
Calculate the percentage change in the levels of cholesterol in the blood between eating 2 g of plant stanol esters per day and 8 g of plant stanol esters per day.
Answer
To calculate the percentage change:
- Determine the initial and final values of cholesterol.
- Use the formula: ext{Percentage Change} = rac{( ext{Final Value} - ext{Initial Value})}{ ext{Initial Value}} imes 100
Assuming 2 g leads to a certain cholesterol level and 8 g leads to a higher level, insert those values to compute the percentage.
Step 3
Describe how the level of cholesterol in the blood changes as the mass of plant stanol esters eaten increases.
Answer
As the mass of plant stanol esters consumed increases, the level of cholesterol in the blood typically decreases. This is because plant stanol esters work by inhibiting the absorption of cholesterol in the intestines, thereby reducing the overall cholesterol levels in the bloodstream. Therefore, higher intakes of plant stanol esters correlate with greater reductions in blood cholesterol.