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2.2 Animal tissues, organs and organ systems

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Question 66
F

A person breathes faster and more deeply during exercise. Which statement best explains why this increases the rate of gas exchange in the lungs?

[1]
A

it increases the number of alveoli available for gas exchange

B

it increases the thickness of the moist lining of the alveoli

C

it increases the volume of blood in the capillaries around each alveolus

D

it keeps the concentration gradients across the alveolar wall steep

Markscheme

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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