Edexcel IGCSE Biology 2.26 daily energy requirements
Practise calculating daily energy requirements and explaining how unmet energy needs affect body mass through respiration of stored fuels.
- Syllabus
- First assessment 2019
- Course
- Biology 4BI1
Exam points
- calculate recommended energy intake from body mass and category data
- explain body mass loss by linking unmet energy needs to respiration of stored lipid or glycogen
2.26 Energy requirements question 1
A balanced diet should include the correct proportions of each component.
Question (a)
(a)
Explain why a pregnant woman may need to take extra minerals and vitamins.
[ 4 ]
Question (b)
(b)
People can be put into body mass categories by comparing their body mass to their height.
Categories include overweight, ideal weight and underweight.
The table shows the recommended daily energy requirement for each body mass category.
[ 3 ]
Question (i)
(i)
Person A has a mass of 70 kg and is categorised as ideal weight.
Calculate the recommended daily energy requirement for person A.
energy requirement = kJ
[ 1 ]
Question (ii)
(ii)
Explain why a person's body mass decreases if they do not have their recommended daily energy requirement.
[ 2 ]
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