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9. Exercise causes changes in the circulation of the blood - Edexcel - GCSE Biology - Question 9 - 2021 - Paper 1
Question 9
9. Exercise causes changes in the circulation of the blood. In an investigation, the change in blood flow to different parts of the body during exercise was measure... show full transcript
Worked Solution & Example Answer:9. Exercise causes changes in the circulation of the blood - Edexcel - GCSE Biology - Question 9 - 2021 - Paper 1
Step 1
Calculate the percentage change in blood flow to the stomach in response to exercise.
Answer
To find the percentage change in blood flow to the stomach during exercise, we can use the following formula:
ext{Percentage Change} = rac{ ext{New Value} - ext{Old Value}}{ ext{Old Value}} imes 100From the graph:
- Blood flow at rest to the stomach: 1000 cm³/min
- Blood flow during exercise to the stomach: 2000 cm³/min
Now, substituting the values into the formula:
ext{Percentage Change} = rac{2000 - 1000}{1000} imes 100 = rac{1000}{1000} imes 100 = 100\%.Thus, the percentage change in blood flow to the stomach in response to exercise is 100%.