Table 1.

Summary of catabolic fuel metabolism

Metabolic process	Catabolic reaction	Caused by	Effect
Hepatic gluconeogenesis	Amino acids → glucose	Increased adrenaline, glucagon, and cortisol concentrations stimulate this mobilisation of fuel stores	Increased blood glucose Protein catabolism
Hepatic glycogenolysis	Glycogen → glucose		Increased blood glucose
Lipolysis	Triglycerides → fatty acids and glycerol		Increased plasma fatty acids
Proteolysis	Protein → amino acids		Increased plasma amino acids