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2 marksThe Circulatory System of Mammals

CAPE Biology Unit 2 · 2014 · Paper 2 · Question 2(c)(ii)

Figure 4 shows a simplified diagram of a longitudinal section of a mammalian heart.

Explain how arterial pressure is affected if the structure labelled D is defective.

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  1. 2(a)State the effect of potassium cyanide on potassium uptake at EACH temperature (0 °C and 25 °C), and give a brief explanation.[4 marks]
  2. 2(b)Using a labelled diagram of a transverse section of a root (including a root hair), illustrate THREE pathways by which water moves from soil into root cells.…[6 marks]
  3. 2(c)(i)Identify the structures labelled A, B, and C in Figure 4.[3 marks]

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