Symptoms of a urinary tract infection (UTI) are similar in men, women, and children. Early symptoms and signs are usually easy to recognize and primarily involve pain, discomfort, or burning when trying to urinate.
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.
Page 5: Protein digestion begins in the stomach â¢ The enzyme pepsin (activated from pepsinogen by HCl) begins the digestion of proteins in the stomach â¢ Pepsin (optimal pH ~2) breaks the peptide bond between tyrosine and phenylalanine amino acids, thereby producing peptide fragments and a few individual amino acids â¢ The neutral pH of the duodenum denatures pepsin, rendering it inactive Page 6: Most digestion and absorption occur in the small intestine â¢ Most chemical digestion and nearly all the absorption occur in the small intestine â¢ Pancreatic digestive enzymes alone are sufficient to digest carbohydrates and proteins â¢ Pancreatic lipase is essential for the bulk of fat digestion