Transport in Animals

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1. What is dissociation?

  • Release of hydrogen from the haemoglobin
  • Release of carbon dioxide from the haemoglobin
  • Release of oxygen from the haemoglobin
  • Attraction of oxygen to the haemoglobin
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2. Which part of the heart is called the pacemaker?

  • Sinoatrial node
  • Vena cava
  • Purkyne tissue
  • Atrioventricular node

3. How is the artery adapted to maintain a high pressure?

  • Narrow lumen
  • Wide lumen
  • Thin walls
  • Valves

4. How is tissue fluid formed?

  • The pressure of the blood becomes too high and small molecules are forced out through gaps in the capillary wall
  • The pressure of the blood becomes too low and small molecules leak out through gaps in capillary walls
  • The pressure of the blood becomes too high and small molecules are forced out
  • The pressure of the blood becomes too high and large molecules are forced out through gaps in the artery walls

5. Which of the following has a closed, single circulatory system?

  • Fish
  • Locust
  • Human

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