Doctors use body mass index (BMI) and waist:hip ratio to assess the risk of a person developing type 2 diabetes.
BMI=mass in kg(height in m)2 \text{BMI} = \frac{\text{mass in kg}}{(\text{height in m})^2} BMI=(height in m)2mass in kgThe Table shows how BMI is used to classify a person.
Table
| BMI | Classification |
|---|---|
| below 18.5 | underweight |
| 18.5 to 24.9 | healthy weight |
| 25.0 to 29.9 | overweight |
| 30.0 to 39.9 | obese |
| 40.0 and above | severely obese |
Person X has a mass of 94.5 kg and a height of 175 cm.
Calculate the BMI of person X. Give your answer to one decimal place.
Use the Table to give the classification of person X.
Person X has a waist circumference of 104 cm and a hip circumference of 96 cm. Calculate the waist:hip ratio of person X. Give your answer to two decimal places.
A rugby player has a BMI of 31.0 and a waist:hip ratio of 0.85. Explain why the waist:hip ratio may give a better indication of the rugby player's risk of type 2 diabetes than BMI.
45 exam-style questions on Edexcel GCSE Biology 7.4 Blood glucose and the urinary system, covering 7.4.1 Insulin and blood glucose control, 7.4.2 Glucagon and blood glucose regulation, 7.4.3 Type 1 and type 2 diabetes, 7.4.4 Structure of the urinary system, 7.4.5 Structure and function of the nephron, 7.4.6 ADH and water regulation, 7.4.7 Treatments for kidney failure, and 7.4.8 Production of urea in the liver. Each one has a worked solution and a mark scheme showing where the marks go.