Transcript protein lesson

What are all these
foods high in?
Objectives
•
•
To understand what protein is.
To understand the difference between LBV’s and HBV’s.
I know the structure of protein. I can understand the
different functions of protein in the diet. I can give a few
food sources.
I know the structure of protein. I can understand the
different functions of protein in the diet. I have some
understanding about high biological and low biological
value proteins and can name a few food sources.
I know the structure of protein. I can understand the
different functions of protein in the diet. I know the
difference between high biological value proteins and low
biological value proteins and can list food examples of each.
I understand two lows make a high.
Protein in the diet
The building
blocks of your
body.
Second source
of energy from
your diet.
Helps the growth and repair
of cells in your body.
Without them your body will
loose muscle so you can not
generate energy.
Protein in the diet
Protein is a source of
energy.
Protein helps keep
skin, hair, and nails
healthy.
Protein, like most
other essential
nutrients, is absolutely
crucial for overall good
health.
What is a protein?
+
Amino acids
=
Protein
22 different types
Our bodies can makes some of these but not all.
Adults need to get the other 8 from foods.
Children need to get the other 10 from foods.
ESSENTIAL AMINO ACIDS
Man
Amino Acids
Amino
acids
Where does protein come from?
Animal Sources
Plant sources
•Meat, fish, dairy, eggs.
•Beans, peas, lentils, nuts, seeds,
cereals.
•All contain the 8 ESSENTIAL AMINO
ACIDS our body needs.
•They do not contain 8 ESSENTIAL
AMINO ACIDS. They have some
•They have a high biological value missing. (except soya beans).
(HBV).
• They have a low biological value
(LBV).
HBV & LBV
= 8 ESSENTIAL
AMINO ACIDS
inside
= 7 ESSENTIAL
AMINO ACIDS
inside. NOT
enough.
= 5 ESSENTIAL
AMINO ACIDS
inside. NOT
enough.
Therefore it has a high
biological value.
Therefore they have a
low biological value.
2 lows make a high
Low biological value
Low biological value
High biological
value
Key Words
High biological value
Low biological value
Amino acid
Building blocks
Essential
Deficiency - Kwashiorkor
Symptoms:
Loose
. when infants
This weight
happens
Tissues waste away.
are weaned from breast
Ribs become visible.
milk
theirdigestion
diet is is
Fat
bellyand
because
replaced with less nutritive
affected.
The
body
becomes
frail and
weak.
food
that
does not
contain
Eyes
appear sunken.
complete
proteins.
Brain damage and death
Deficiency - Kwashiorkor
HBV
Kwashiorkor
Soya beans
Protein
Amino Acids
LBV
Essential
Amino acids
Cereals