Biosynthesis

Carbs break down into glucose, proteins into amino acids, and fats into triglyceride

Excess glucose and amino acids can be turned into fat

You gain weight by eating more food than the energy that you use from cellular respiration

Amino acids and triglycerides can make ATP when the glucose pool is empty

Storing fat is an endothermic process because you build bonds

Glucose pools need to be depleted before accessing fat stores

Glucose can be used as immediate energy or stored energy in the form of glycogen that goes to liver and muscles.

Amino acids can be used for building blocks to make muscles, enzymes, hormones, and antibodies, or used as energy, or stored as fat.