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Biology paper 1
Organisation
Nutrients
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Leo hutchby
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A
balanced
diet is one that includes appropriate amounts of all
nutrients.
Carbohydrates
,
lipids
, and
proteins
are the 3 we need to consume in large quantities.
Carbohydrates
provide the most energy.
Activity level
,
age
and
pregnancy
all affect how much
energy
a person
requires.
Lipids
are used to provide
energy
and to
insulate
us.
Proteins
are used growth, development and repair.
Vitamin
A
is good for maintaining healthy vision, hair and skin.
A lack of vitamin
C
can lead to scurvy
Calcium
helps build strong bones.
Vitamin
D
helps us absorb
calcium.
It can be made using
sunlight.
Iron
is an important component in
haemoglobin
and a lack of
iron
can lead to
anaemia.
Fibre
helps food move through our
intestines.
70%
of our body is water.
Biological molecules
are molecules found in living organisms and are produced by cells.
Carbohydrates
are made up of
carbon
,
oxygen
and
hydrogen
glucose is an example of a
simple sugar
Glycogen and starch are examples of
complex carbohydrates.
Lipids contain a single
glycerol
molecule and three
fatty acid
molecules