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2.2 Animal tissues, organs and organ systems

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Question 32

A musician breathes in before playing a long note. This ventilation brings fresh air to the alveoli.

Which statement best explains why carbon dioxide moves from the blood into the alveolar air rather than in the opposite direction?

[1]
A

the concentration of carbon dioxide is higher in the arriving blood than in the alveolar air

B

carbon dioxide diffuses from a lower concentration in the blood to a higher concentration in the alveolar air

C

carbon dioxide is actively pumped through the alveolar wall from the blood

D

ventilation carries carbon dioxide directly through the alveolar wall from the blood

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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