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2.2 Animal tissues, organs and organ systems

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Question 8

Researchers measured features affecting gas exchange in two people at rest.

MeasurementPerson PPerson Q
Total surface area of alveoli in the lungs in m²7074
Mean thickness of the alveolar walls in µm0.51.5
Blood flow through the lung capillaries in dm³ per minute5.02.5
Volume of fresh air reaching the alveoli in dm³ per minute4.22.0

Evaluate which person is likely to have the greater rate of oxygen diffusion into the blood. Use all the data in the table.

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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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