Chapter 3 - Food and Diet Flashcards
How do plants make their food
They photosynthesis
How do animal get their food
They eat plants or other animals
What is food needed for
As a source of energy
To provide materials for growth
Name the 3 groups carbohydrates can be split into
Starch
Sugar
Fibre
What is the function of starch and 2 examples of it
To provide energy
Examples = bread and potatoes
What is the function of sugar and 2 examples of it
To provide energy
Examples = biscuits and soft drinks
What is the function of fibre and 2 examples of it
To prevent constipation
Examples = green vegetables and cereals
What is the function of protein and 2 examples of it
For growth and repair of damaged cells
Examples = meat and eggs
What is the function of fats and 2 examples of it
To provide energy
To regulate body temp
To insulate the body
To protect delegate organs
Examples = butter and oils
What is the function of vitamin C and 2 examples of it
For healthy skin and gums. Prevents Scurvy
Examples = oranges and tomatoes
What is the function of vitamin D and 2 examples of it
To build strong bones and teeth. Prevents rickets
Examples = milk and cheese
What is the function of iron and 2 examples of it
Makes red blood cells. Prevents anaemia
Examples = red meat and cabbage
What is the function of calcium and 2 examples of it
For healthy bones and teeth
Examples = milk and cheese
Don’t forget experiment for the presence of starch ( pg 19 )
Substance used for dying foods is iodine. If it turns purple/black it means that starch is present
Don’t forget experiment for the presence of a reducing sugar i.e. glucose ( pg 20 )
In one test tube we have : glucose and Benedicts solution
In other test tube we have : water and Benedicts solution
Place both the test tubes in a water bath
If the reducing sugar is present , the Benedicts solution turns from blue to red