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Question 18M.3.HL.TZ1.c

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Date May 2018 Marks available [Maximum mark: 3] Reference code 18M.3.HL.TZ1.c
Level HL Paper 3 Time zone TZ1
Command term Explain Question number c Adapted from N/A
c.
[Maximum mark: 3]
18M.3.HL.TZ1.c

Hypertension has been suggested as a possible cause of CHD. Explain the possible causes of hypertension.

[3]

Markscheme

a. deposition of fat in arteries thus losing elasticity/forming fibrous tissues 

b. deposition of fat/formation of plaque in arteries thus narrowing of lumen/causing a blockage 

c. high salt levels in diets thus retaining more fluids 

d. smoking because nicotine is a vasoconstrictor molecule 

e. prolonged high levels of stress thus causing vasoconstriction / exposure to stress hormones 

f. genetic predisposition makes it more likely that other factors will lead to hypertension

Do not accept a list.

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