Edexcel IGCSE Biology 复习笔记 2.5.7 Humans: Balanced Diet
Edexcel IGCSE Biology 复习笔记 2.5.7 Humans: Balanced Diet
The Importance of a Balanced Diet
- A balanced diet consists of all of the food groups in the correct proportions
- The necessary key food groups are:
- Carbohydrates
- Proteins
- Lipids
- Dietary Fibre
- Vitamins
- Minerals (mineral ions)
- Water
Food Groups Functions & Sources Table
Vitamins and minerals are required for many specific functions of the body
Malnutrition
- Having an unbalanced diet can lead to malnutrition
- Malnutrition can cause a variety of different health problems in humans
Causes & Effects of Malnutrition Table
Dietary Needs of Individuals
- The nutritional requirements for individuals will vary throughout their lifetime
- An individual will still require the same key food groups, but in different quantities depending on a number of factors such as age, height, sex, activity levels, pregnancy and breastfeeding
Variations in Dietary Requirements Table
转载自savemyexam
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