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1 markTransport Systems

CSEC Biology · January 2008 · Paper 2 · Question 3(b)(ii)

Heart muscle cells get their requirements from blood in coronary arteries.

Identify ONE substance found in the blood supply that can cause the walls of the coronary artery to thicken.

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Other parts of this question

  1. 3(a)(i)Using FOUR arrows ONLY show the direction of flow of blood into and out of the human heart illustrated in Figure 3.[4 marks]
  2. 3(a)(ii)Name the blood vessels labelled P and Q respectively.[2 marks]
  3. 3(a)(iii)Some babies are born with a small opening in the wall/septum between the two upper chambers of the heart. Suggest how this condition would affect the…[2 marks]
  4. 3(b)(i)Name TWO substances that the heart muscle cells will receive in this blood supply.[2 marks]
  5. 3(b)(iii)How does the thickening of the coronary arterial wall affect the heart?[2 marks]
  6. 3(c)Identify TWO types of transport vessels in plants and for EACH identify ONE substance which it transports.[4 marks]

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