Food and Digestion Flashcards
Definition of Digestion
‘Breaking down large food molecules into smaller molecules so that it can be absorbed by the body
Food is digested by chemicals called
Enzymes
Know the names of 3 digestive enzymes and what they digest
- Amylase digests starch
- Protease digest protein
- Lipase digest fat
Describe the action of an enzyme changes with temperature
If temperature is too high, enzymes looses its shape and stops working (de natures)
Describe how the action of an enzyme changes with acidity (pH)
Most enzymes work best as pH 7 Protease work best at pH 1-2
Know what a balanced diet is
A balanced diet is A balanced diet contains the different nutrients in the correct amounts to keep us healthy
What are the seven nutrients you need for a balanced diet
Carbohydrates,Proteins,Fats,Vitamins,minerals,fibre,water
Carbohydrates used for?
Energy
Proteins used for?
Growth and Repair
Fats are used for
Energy and to make cell membranes
What are vitamins used for
For Cells to work properly
Minerals are made for
To make body chemicals
Water is for
Chemical reaction and transport
Examples of food
Carbohydrates-potatoes Protein-Fish Vitamins minerals carbohydrates and fibre- veggies or fruits Dairy (proteins)- Milk Fat-cake
Why do people need different amounts of food than others
Each person needs a different amount of energy depending on factors such as:
gender (male or female)
age
amount of daily activity
