ALTERNATIVE FUELS FOR CELLULAR

RESPIRATIONGlucose is not the only fuel for

respiration

PROTEINS (LAST RESORT ENERGY SOURCE)

Proteins can be fuel if broken down into amino acids

Amino acids transformed by liver enzymes into 4 – 5 carbon acids that enter Glycolysis or Krebs Cycle.

*amino group removal results in build up of nitrogenous wastes

DIAGRAM

FATSFats broken down into glycerol to

become an intermediate of glycolysis and fatty acids that enter the Krebs cycle.

Fats create twice as much ATP per gram than carbohydrates.

CONTROL OF RESPIRATIONIf energy demand is high → blood

glucose broken down by glycolysisIf blood glucose is low → stored glycogen broken down

If energy demand is low → blood glucose is stored as glycogen and then as fat