Energy releasing process that breaks down large molecules into smaller ones.
It happens when your body has no other energy to use apart from lean muscle tissue, it usually occurs during long periods of cardio (about an hour +) or when you don't have sufficient nutrient...
Yes
Aerobic respiration is the most important catabolic reaction, as glucose is broken down with oxygen to form carbon dioxide and water.
Glucose catabolism provides energy for needed metabolic cellular processes.