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2.2 Animal tissues, organs and organ systems

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Question 23

Respiring body cells produce carbon dioxide. The carbon dioxide passes into the blood in nearby capillaries. Which statement explains why carbon dioxide moves from the cells into the blood?

[1]
A

Carbon dioxide is actively pumped out of the cells and into the blood by the capillary wall

B

Carbon dioxide is carried out of the cells and into the blood by haemoglobin

C

Carbon dioxide diffuses from a higher concentration in the cells to a lower concentration in the blood

D

Carbon dioxide diffuses from a lower concentration in the cells to a higher concentration in 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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