1. NUTRITION

2. Protein: Why do we need it?
Audio Podcast
Protein: Why do we need it?

3. Todays Lesson
To develop an awareness of the importance of the macronutrients namely protein the diet.
Recall previous knowledge of last class on healthy eating
Describe composition of protein
Understand composition of protein
List sources of protein
Relate to functions of protein
Calculate individual RDA of protein

4. QUESTION TIME Name the six nutrients
List the healthy eating guidelines?
What do you do to keep healthy?
How do some people lead unhealthy lives?

5. Why do you eat food? To give a feeling of fullness The social aspect
To get goodness out of it
To prevent illnesses

6. What goodness do we get from food?
Strong bones and teeth
Energy
Growth
Prevents constipation
General good health
Nutrients in foods do these and more jobs in the body

7. PROTEIN
FAT
WATER
NUTRIENTS
MINERALS
CARBOHYDRATE
VITAMINS

8. Nutrients Macro Nutrients Micro Nutrients
Our bodies need these in large amounts
They are too big to be absorbed by the body so they must be broken down
Protein, fats and carbohydrates
Our bodies need these in small amounts
They are small enough to be absorbed by the body once eaten
Minerals and vitamins

9. PROTEIN

10. CLASSIFY
FUNCTIONS
SOURCES
PROTEIN
STRUCTURE

11. PROTEIN STRUCTURE Proteins are made up of amino acids
Amino acids are joined together with peptide links

12. CLASSIFICATION OF PROTEIN
HIGH BIOLOGICAL VALUE PROTEIN
LOW BIOLOGICAL
VALUE PROTEIN
Contains all essential amino acids
Essential amino acids are the amino acids the body needs but cannot make so must get them from food
Normally come from animal foods
Do not contain all essential amino acids
Normally come from vegetable foods

13. SOURCES OF PROTEIN High biological value Low biological value
Meat, Fish, Eggs Cheese
Peas, Beans, Nuts, Pasta

14. BIOLOGICAL FUNCTIONS OF PROTEIN
Growth
Repair of worn out or damaged cells
Production of hormones, enzymes and antibodies.
Gives us energy and heats our body

15. RDA Adults require 1g of protein for each kg of body weight. Eg:
If I way 70kg I will need 70g of protein daily.
Using your tablets, draw up a list of food items that will equal 70g of protein in your daily diet.

16. QUESTION TIME What are protein chains made up from?
Classify protein into its two groups
Name three animal protein foods
Name three vegetable protein foods
Name three biological functions of protein
What link joins the amino acids together along the protein chain
What are essential amino acids