Source of Energy
The fuels of the body
carbohydrates
fats
proteins
Carbohydrates
fats
Protein
the principal source of energy in most diets
They are absorbed into the bloodstream in the form of glucose
Glucose not needed for immediate use is converted into glycogen and stored in the liver
When the blood sugar concentration goes down, the liver reconverts some of its stored glycogen into glucose
the second largest source of energy in most diets
They are stored in adipose tissue
If excess carbohydrate is taken in
The stored fat is utilized when the liver is empty in glycogen
it's essential for the growth and rebuilding of tissue
also can be a utilized as a source of energy
Proteins are first broken down into amino acids
Amino acids not used by the body are eventually excreted in the urine in the form of urea