Transcript Protein Sources and Vegetarianism

Functions of Proteins
Review Note
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Proteins Help in:
1.Growth of new tissue
2.Replacing worn out cells
3.Balancing flow of certain molecules in and
out of cells
4.Provide energy as a last resort
5.Hormones – chemical messengers that
send signals throughout the body (ex
insulin)
6. Antibodies - to fight infection and disease
What Are Proteins?
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Building Blocks are Amino Acids (chemicals)
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Amino Acids stuck together by Peptide
Bonds to form long chains
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Long chains are folded into different
shapes through hydrogen bonds
Why does this structure matter?
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The shape determines the function
Example: Hemoglobin carries
oxygen through blood
- small ball-like shapes
-> easily carried in blood
Why does Structure Matter Cont’d
Example: Muscle Fibers
- long, thin shapes
Amino Acids:
The Building Blocks of Proteins
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There are 20 different Amino Acids
Our Bodies can make 11 of them
We need to get the other 9 from our food
 These are called Essential Amino Acids
So where can we find these
essential amino acids in our diet?
Hint:
Think back to what the proteins do in the body.
Sources
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All meats and animal products- eggs,
cheese
Fish
Legumes
Beans- Soybeans [tofu] , lentils, lima
Peanut butter
Protein in Eggs- shell , yolk,
white
Meat proteins
Fish- proteins
Fish Proteins cont’d
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Less connective tissue
Liquefies easily.
More tender and cooks quickly
Cooked when flakes
Nuts and legumes
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Black beans
Peas
Garbanzo beans
Kidney beans
Lentils
Navy beans
Pinto beans
Chick peas
soybeans
Vegetarian
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Why?
1. Ethical
- abuse of animals
- killing animals
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2. Health
3. Environmental
- manure pollution
- 10X amount of land as crops
- less water consumed
Ovo- lacto vegetarian
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Includes eggs and
milk products
Partial vegetarian
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Does not eat red
meat
May include chicken
or fish
Vegan---Only plant food sources
No animals or animal products
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Vegetables, fruits,
grains
Vegetarian diets
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pros
Eat more fruits and
veggies
More fiber-fewer
digestive disorders
More health conscious
Less alcohol and
smoking
Less obesity
Less heart disease
Less type II diabetes
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Cons
Harder to get protein
Risky when pregnant or
ill and children
More care in getting all
nutrients
Increase in deficiency
diseases