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3 marksThe Circulatory System of Mammals

CAPE Biology Unit 2 · 2003 · Paper 1 · Question 4(d)

Figure 5 shows a longitudinal section of the mammalian heart.

Clearly indicate on Figure 5 the positions of: (i) Sinoatrial node, (ii) Atrioventricular node, and (iii) Purkyne tissue.

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Other parts of this question

  1. 4(a)Deduce the type of blood vessel shown in Figure 4 and give ONE reason for your answer.[1 mark]
  2. 4(b)Using your knowledge of the diameter of a red blood cell, determine the length of the section of the vessel labelled A.[1 mark]
  3. 4(c)(i)After exercising vigorously, a person's face may become flushed red. State what causes the face to appear red.[1 mark]
  4. 4(c)(ii)If you were cut while exercising, state ONE way by which you could determine whether you had cut an artery or a vein.[1 mark]
  5. 4(e)In a condition known as fibrillation, the heart pace-maker fails. Deduce what would occur as a result of this situation.[2 marks]
  6. 4(f)Atherosclerosis is a thickening of the artery walls as a result of deposition of fat and cholesterol in the lining. Deduce the effect this would have on blood…[1 mark]

More practice: the rest of this paper · more The Circulatory System of Mammals questions · all CAPE Biology Unit 2 past papers