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8 marksThe Circulatory System of Mammals

CAPE Biology Unit 2 · 2004 · Paper 2 · Question 6(b)(i)

During a space mission, a fault in the air filters caused an increase in carbon dioxide in the air. Discuss how this affects the oxygenation of the blood and the offloading of oxygen in the tissues.

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Other parts of this question

  1. 6(a)(i)Describe the structure of a red blood cell.[2 marks]
  2. 6(a)(ii)Explain how red blood cells have the ability to carry large amounts of oxygen.[4 marks]
  3. 6(a)(iii)Describe how old erythrocytes are removed from the blood and disposed of in the body.[2 marks]
  4. 6(a)(iv)Explain why haemoglobin is NOT lost from the blood into the urine.[2 marks]
  5. 6(b)(ii)On earth, at sea level, an oxygen partial pressure of 5 kPa results in a 50% saturation of haemoglobin by oxygen, and a partial pressure of 10 kPa results in a…[2 marks]

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