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Module 2: Food and Health
2.2.1 Diet and Food Production

(a) define the term balanced diet
A balanced diet is a diet that contains appropriate amounts of all necessary nutrients required for healthy growth
and activity. This includes:
Carbohydrates ­ for energy
Fats ­ for energy and insulation
Proteins ­…

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Module 2: Food and Health
BMI is only for adults
(c) discuss the possible links between diet and coronary heart disease
Coronary heart disease (CHD) is the result of atherosclerosis. Atherosclerosis is the deposition of fatty substances
in the walls of coronary arteries. It narrows the size of the lumen…

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Module 2: Food and Health


(e) explain that humans depend on plants for food as they are the basis of all food chains
Plants start off all food chains . They carry out photosynthesis , where they convert light energy into
chemical energy absorb carbon dioxide from the air and…

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Module 2: Food and Health



(i) describe the advantages and disadvantages of using microorganisms to make food for human
consumption
Microorganisms can spoil food in 4 ways:
Visible growth colonies of Mucor and Penicillium can grow on food turning it either black or
blue/green .
External digestion process they release…

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Module 2: Food and Health
Freezing Slows down reactions taking place in microorganisms so growth and reproduction is slow

Heat
Kills microorganisms, e.g. pasteurising involves heating to 72o C for 15 seconds and then cooling
o
Treatment rapidly to 4 C, killing harmful microorganisms
Irradiation Involves exposing foods to ionising…

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