Have you ever wondered what the difference is between a fat that is liquid and a fat that is solid at room temperature? Let's begin by explaining why room temperature fats are solid or liquid. Fats are liquid or solid according to their chemical make up or how their building blocks are stacked together.
Protein digestion begins in the stomach with the action of an enzyme that we previously learned about called pepsin. Pepsin is the active protein-digesting enzyme of the stomach. When pepsin acts on the protein molecule, it breaks the bonds that hold the protein molecule together, called peptide bonds.
The pancreas also releases enzymes that split carbohydrates, proteins and the bile-emulsified fats. Most digestion is completed in the duodenum. The remainder of the small intestine, the jejunum and ileum, are concerned with absorption.nzymes secreted by the pancreas are squirted into the duodenum, where fat, protein, and carbohydrate digestion continues. The last site of digestion occurs on the brush border of the small intestine, where the last of the fat, protein and carbohydrate digestion occurs. There are no digestive enzymes in the colon.