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2.2 Animal tissues, organs and organ systems

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Question 92
F

In a chest infection, fluid collects inside some of the alveoli. Which statement explains why less oxygen enters the blood from these alveoli?

[1]
A

the alveoli affected have a larger surface area for diffusion

B

oxygen must diffuse through the fluid as well as the alveolar wall

C

carbon dioxide leaves the blood more quickly than it is produced

D

the alveoli affected have a steeper concentration gradient for oxygen

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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

179 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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