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8.2 Blood and circulation

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Question 2
F

The Figure shows the mean blood pressure in different blood vessels as blood flows from the heart, around the body and back to the heart.

Figure

image

a.

Calculate the percentage decrease in mean blood pressure from the large arteries to the capillaries.

[2]
b.

The pressure in the aorta rises and falls with each heartbeat.

Explain why.

[2]
c.

Use the Figure to explain why veins need valves but arteries do not.

[2]
d.

Suggest why the blood pressure in the capillaries must be lower than the blood pressure in the arteries.

[1]
Markscheme

8.2 Blood and circulation Questions

  1. GCSE
  2. /Biology
  3. /8.2 Blood and circulation

42 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.

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