This question was attempted by many candidates and their performance was fair. In part (a) many candidates could correctly listed the main food sources of roughage. In part (b) many candidates could not mention food substances that could be used to correct goitre. In part (c) many candidates could not state functions of the following minerals; fluorine, iodine and sodium. In part (d) many candidates correctly stated ways of preventing cholera.
The expected answers were as follows:
8(a) Main sources of roughage
- Vegetables
- Fruits
- cereals
(b) Food substances that could be used to correct goitre
- Sea food
- Green vegetables
- Iodised salt
- Fresh fish/dried fish
(c) Functions of minerals
- for healthy teeth/prevention of cavity formation
- prevention of teeth decay
- Production of thyroxin
- proper function of thyroid gland
- regulates fluid/blood in the body
- essential in tissue/muscle development
- transmission of nerve impulses
(d) Prevention of Cholera
- drinking filtered and treated water
- immunization against cholera
- controlling of housefly
- proper disposal of contaminated materials/refuse
- maintaining food hygiene.
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