B3: Exercise and our Body (Respiration)

This is a document mainly for students taking AQA Additional Science. It contains information on respiration (both aerobic and anaerobic) as well as exercise and our body from the B3 (biology) specification. I hope this helps you to revise! Please rate and comment on how to improve :) Also, i have a study group called AQA Additional Science where we discuss topics such as this one and many more. Feel free to become a member, the more the merrier!

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B3: Exercise and Our Body

The human body needs to react to the increased demand for
energy during exercise.

The energy that is released during respiration is used to enable
muscles to contract.

During exercise a number of changes take place:
The heart rate increases
Rate and depth of breathing…

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Anaerobic Respiration

Anaerobic respiration is the incomplete breakdown of glucose and
produces lactic acid.

As the breakdown of glucose is incomplete, much less energy is
released than during aerobic respiration.

Anaerobic respiration results in an oxygen debt that has to be
repaid in order to oxidise lactic acid to carbon…

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