Lucture 3
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what is food?
Food is the basic necessity of life
Why food is important?
1) to keep fit 2) to carry on all the life processes
What are autotrophic ?
They prepare their own food like green plants
What are heterotrophic organisms ?
They depands on others
What are nutrients ?
They are the organic or inorganic substances wich help in our survival and in maintaining proper health .`
What are the importance of nutrients ?
1)supplies the body with energy 2)builds and repairs body tissues 3)regulates the body metabolism
What are the two categories of nutrients ?
1)macronutrients 2)micronutrients
What are the macronutrients ?
Nutients required in a large amount of. Ex:carbohydrates ,fats , proteins and water contained in food comprise macronutrients .
What are the micronutrients ?
Nutrients required in small amounts . Ex:vitamins ,minerals from only a small fraction of the total weight of the food ?
What is photosynthesis?
It is the process by which plants, some bacteria use carbon dioxide, water and the energy from sunlight to produce glucose and oxygen.