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Edexcel A-Level Biology AS 1.19 Scientific Knowledge and Chd Risk Reduction Questions

Practise applying evidence about diet, BMI, WHR, exercise and smoking to explain how scientific knowledge reduces CHD and CVD risk.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • calculate BMI or WHR and use thresholds or graph data to judge obesity-related risk
  • suggest lifestyle changes that reduce CVD risk, including exercise and lower saturated fat
  • interpret data on BMI, WHR or behaviour to predict CHD and CVD risk patterns

Edexcel A-Level Biology AS 1.19 Scientific Knowledge and Chd Risk Reduction Questions question 1

[Maximum number: 6]

Obesity increases the risk of cardiovascular disease (CVD).
Body mass index (BMI), waist-to-hip ratio (WHR) and skinfold thickness are indicators of obesity.

Question (a)

(a)

The table shows some measurements taken from two females, female J and female K.

Table for Question (a) — Edexcel A-Level Biology AS
[ 4 ]

Question (i)

(i)

Comment on the risk of developing CVD in these two women.

[ 2 ]

Question (ii)

(ii)

The diagram shows how the waist and hip measurements should be taken, using a tape measure.

Figure for Question (ii) — Edexcel A-Level Biology AS

Explain how the way a person takes these measurements could produce an underestimate of their risk of CVD.

[ 2 ]

Question (b)

(b)

The diagram shows how a skinfold thickness measurement is taken over the triceps muscle at the back of the arm.

Figure for Question (b) — Edexcel A-Level Biology AS

Skinfold thickness measures the thickness of the layer of fat under the skin.
Measurements are taken from several sites on the body.
The table shows the skinfold thickness at four sites on a 42-year-old female.

Table for Question (b) — Edexcel A-Level Biology AS
[ 2 ]

Question (i)

(i)

Suggest two reasons why the skinfold thickness values are different at each site on the body.

Assume that the skin callipers have been used correctly.

[ 2 ]
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