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Explain the Breakdown of Carbohydrates
digestion breaks carbohydrates down into glucose for immediate use
if stored, the glucose is stored as glycogen and then at a later time when needed, it is reconverted back into glucose as an energy source
How is Glucose used in the Body?
immediate use - glucose diffuses into the body cells and is used to meet their energy demand immediately
stored - glucose is stored in the skeletal muscles as glycogen and is used when the body is working harder
stored - some of the glucose is stored in the liver as glycogen and is used to maintain blood sugar levels
Explain the Breakdown of Fats/Lipids
digestion breaks down the fats and some remain in the bloodstream as fatty acids, and other as triglycerides
these are accumulated for storage in fatty or adipose tissue around our body
Explain the Breakdown of Proteins
digestion breaks proteins into amino acids
in extreme circumstances such as an ultra marathon or long periods of starvation, the body will be depleted of its carbohydrates and fat reserves and switch to proteins to keep producing ATP
since protein makes up the cells and tissues, they body will have to break down its own cells to produce ATP which is known as self-destruction and is dangerous and not sustainable for long periods of time