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

 

  • 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

Balanced-diet-table

 

 

Vitamins-and-Minerals-1

 

 

Vitamins-and-Minerals-2-1Vitamins 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

 

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

 

Balanced-diets-table

转载自savemyexam

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