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2.2 Animal tissues, organs and organ systems

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Question 2

Some long-term medical conditions cause the walls of capillaries to become thicker. A scientist measured the mean thickness of capillary walls in tissue samples from a healthy person and from a person with one of these conditions.

Tissue sampleMean capillary wall thickness in µm
Healthy person0.8
Person with the condition2.4
a.

Calculate how much thicker the capillary walls were in the person with the condition.

[1]
b.

Explain how the thicker capillary walls would affect the exchange of substances between the blood and the tissue cells.

[2]
Markscheme

2.2 Animal tissues, organs and organ systems Questions

  1. GCSE
  2. /Biology
  3. /2.2 Animal tissues, organs and organ systems

304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.

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