1 markThe Circulatory System of Mammals

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

Figure 4 shows a photomicrograph of red blood cells passing through a blood vessel.

Deduce the type of blood vessel shown in Figure 4 and give ONE reason for your answer.

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Other parts of this question

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]
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(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]
4(d)Clearly indicate on Figure 5 the positions of: (i) Sinoatrial node, (ii) Atrioventricular node, and (iii) Purkyne tissue.[3 marks]
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]
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]

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