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GCSE Biology
Exam Board: AQA
B1.1.1 ­ Diet and Exercise…read more

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The Importance of a Balanced Diet
Carbohydrates A balanced diet contains all of
these components within the
right amounts
Vitamins If your diet is not balanced
Minerals you may become
malnourished (become too fat
or thin) or suffer form
Water deficiency diseases.…read more

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Losing Weight
To lose body mass, people either eat less or exercise
These both lead to more energy being used up than taken
in, and the body is forced to use up some of its stored fat for
energy.…read more

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Metabolic Rate
Metabolic rate is the rate at which chemical reactions take
place in all of the cells of the body
The higher the muscle to fat ration in the body, the higher
the metabolic rate
Muscle to fat ratio increases during exercise
Metabolic rate can also be affected by inherited factors…read more

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Fatty Foods
One gram of fat releases almost twice as much energy as
one gram of carbohydrate or protein
Proteins are not a major source of energy for the body as
they are used for things like growth and repair…read more

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Heart Attacks
A high level of cholesterol in the blood increases the risk of
developing plaques in the walls of the arteries that supply the
heart with blood.
Plaques make it more likely that a blood clot will form, and this
can block the artery
This will stop blood carrying oxygen getting to the heart and so
heart cells die.
This area of the heart no longer functions…read more

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