Insulin is a peptide hormone produced by betacells of the pancreatic islets in the pancreas. It regulates the metabolism of carbohydrates, fats and protein by promoting the absorption of glucose from the blood into liver, fat through proteins, called pumps, which actively transport it through the cell membrane. Insulin promotes, through binding to insulinreceptors, the synthesis of glycogen, fatty acids and triglycerides which can be used to produce energy in fasting conditions through catabolic processes.
It is better to break a bone than tear a muscle as bones have more blood supply to them than ligaments/tendons. Ligaments/tendons are also more complex to rebuild. In general, wounds heal slower when blood cannot circulate properly.
