The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease. (a) Calculate the waist-to-hip ratio for a person with a waist measurement of 830 mm and a hip measurement of 0.99m. Give your answer to 2 decimal places. (b) Dieting can reduce the effects of cardiovascular disease. (i) Which statement gives a reason why dieting can be used to reduce weight in obese people? A Dieting increases metabolism and growth rate B Dieting reduces energy consumption C Dieting decreases metabolism D Dieting increases energy consumption (ii) A scientist is planning to test a new diet for weight loss. She selects 40 obese people to take part in the test. All the obese people are between 20 and 30 years of age. State two other factors the scientist should control when selecting the people. (iii) Devise a plan the scientist could use to test the effectiveness of the new diet using the 40 obese people.

GCSE Edexcel Biology Cardiovascular diseases: The ratio of waist-to-hip measur

The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1

Question 3

The-ratio-of-waist-to-hip-measurements-can-be-used-to-determine-the-risk-of-a-person-developing-cardiovascular-disease-Edexcel-GCSE Biology-Question 3-2016-Paper 1.png

The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease. (a) Calculate the waist-to-hip ratio for a p... show full transcript

Worked Solution & Example Answer:The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1

Step 1

Calculate the waist-to-hip ratio

96%

114 rated

Answer

To calculate the waist-to-hip ratio, use the formula:

$\text{Waist-to-Hip Ratio} = \frac{\text{Waist Measurement}}{\text{Hip Measurement}}$

For the given measurements:

Waist = 830 mm = 0.830 m
Hip = 0.99 m

Plugging these values in:

$\text{Waist-to-Hip Ratio} = \frac{0.830}{0.99} \approx 0.838 \text{ (rounded to 3 decimal places)}$

Therefore, rounded to two decimal places, the waist-to-hip ratio is approximately 0.84.

Step 2

Which statement gives a reason why dieting can be used to reduce weight in obese people?

99%

104 rated

Answer

The correct statement is:

B Dieting reduces energy consumption.

Dieting usually involves consuming fewer calories than the body burns, leading to weight loss over time.

Step 3

State two other factors the scientist should control when selecting the people.

96%

101 rated

Answer

Gender - To ensure that the results are not skewed due to differences in metabolism and body composition between genders.
Physical Activity Levels - To account for differing levels of exercise which can affect weight loss independently of diet.

Step 4

Devise a plan the scientist could use to test the effectiveness of the new diet using the 40 obese people.

98%

120 rated

Answer

Random Assignment: Randomly assign the 40 participants into two groups, one following the new diet and the other following a control diet.
Duration: Implement the diet for a fixed duration, say 12 weeks.
Monitoring: Regularly monitor weight and body measurements every week to track progress.
Control Variables: Ensure both groups maintain similar physical activity levels and record any other dietary intake.
Post-Test Assessment: At the end of the study, measure weight loss and other health indicators to evaluate the diet’s effectiveness.
Data Analysis: Use statistical methods to compare weight loss between the two groups.

The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1

Worked Solution & Example Answer:The ratio of waist-to-hip measurements can be used to determine the risk of a person developing cardiovascular disease - Edexcel - GCSE Biology - Question 3 - 2016 - Paper 1

Calculate the waist-to-hip ratio

Which statement gives a reason why dieting can be used to reduce weight in obese people?

State two other factors the scientist should control when selecting the people.

Devise a plan the scientist could use to test the effectiveness of the new diet using the 40 obese people.

Join the GCSE students using SimpleStudy...