Nutrition:
Protein
Chapter 5
Lesson 3
Analyzing Protein
Objective 1: Identify the role of
protein in your body
 Objective 2: Be able to identify
where you could obtain the 9 essential
amino acids
 Objective 3: Give an example of how
to make incomplete proteins complete
by combining foods

Review from Lesson 2



What are simple carbohydrates?
 Sugars; glucose, fructose, lactose
 Examples?
 Fruits, Milk, Cake, Candy, Pop
What are complex carbohydrates?
 Starches
 Examples?
 Whole grains, seeds, nuts, legumes, tubers
The body must break down__________
carbohydrates into ___________carbohydrates
before it can use them for energy.

Complex/simple
Protein, What is it? How does
it work?

Protein
Nutrients that help build and maintain body cells
and tissues
 Made up of chains called, Amino Acids


Your body can manufacture all but 9 of the
20 different amino acids that make up
proteins.

These 9 amino acids are known as Essential
Amino Acids
 So
where do we get them?
Complete Proteins

Complete Proteins
Contain adequate amounts of all nine essential
amino acids.
 Found in animal products

 Fish
 Meat
 Poultry
 Eggs
 Dairy
Products; milk, cheese, yogurt
Controversial Topics
What other mammal (besides humans)
needs to drink milk from a cow (other
than a baby calf)?
 Is rHBT (growth hormone) safe?
 http://www.consumerhealth.org/article
s/display.cfm?ID=19991128221446
 Should animals be regularly fed
antibiotics?
 How can this have an affect on us?

Videos
“Pink Slime”
http://www.youtube.com/watch?v=87uBMXdIyjo
Cows Fed Candy
http://www.youtube.com/watch?v=iMcAtdholmM
Superbug found in Chicken
http://www.youtube.com/watch?v=fX-oeYZZsL8
Antibiotic Risks to Humans
http://www.youtube.com/watch?v=CJDymQ7kjNc
Genetically Modified Salmon
http://www.youtube.com/watch?v=swYAuQjPnOc
Vegetarians




Do not eat meat
There is a difference between vegetarians and
vegans. What is it?
May have a challenge getting protein, so how do
they?
 Eggs, Milk, Cheese, Yogurt
 Beans, legumes, grains, nuts, seeds
Combining foods carefully is the key
 Ex: Legumes + Grains
 Ex: Nuts + Seeds
Incomplete Proteins

Incomplete Proteins
Lack one or more of the essential amino acids
 Sources

 Beans,
peas, nuts, and whole grains
 If you were to combine peanut butter and bread,
that would give you a complete protein

You don’t have to combine the incomplete
proteins in one meal, you just need to eat
them over the course of the day!
Role of Proteins

Proteins have many functions including;
During major growth periods such as;
adolescence, puberty, & pregnancy, the body
builds new cells and tissues from the amino
acids in proteins.
 Throughout your life your body replaces
damaged or worn-out cells by making new ones
from protein.

Role of Proteins
Your body also produces enzymes, hormones and
antibodies from proteins.
 Proteins help supply your body with energy, even
though they are not the main source.
 Proteins, like carbs, provide 4 calories per every 1
gram.
 Excess protein is converted to body fat
