Answer:
carbohydrates:
●glycogenolysis may be required
●certain amino acids can be converted to glucose as a replacement for this
●the liver stores enough glycogen for about 4 hrs after the last meal
The term glycogenolysis, conversion of amino acids to glucose and glycogen are related with carbohydrates
Fats:
●glycerol is converted to a usable energy source
●may have to be oxidized to ketone bodies
The term conversion of glycerol to energy source and use of ketone bodies are common in fats
Proteins:
●last resort as an energy source
●muscle cells begin to atrophy if glycogen and fat reserves are depleted
●an extreme wasting called cachexia
This all relates to protein explaining why it's the last resort of energy source
