AP BIOLOGY

Detailed explanation-1: -Lactose intolerance occurs when your small intestine doesn’t produce enough of an enzyme (lactase) to digest milk sugar (lactose). Normally, lactase turns milk sugar into two simple sugars-glucose and galactose-which are absorbed into the bloodstream through the intestinal lining.

Detailed explanation-2: -Lactose intolerance is usually the result of your body not producing enough lactase. Lactase is an enzyme (a protein that causes a chemical reaction to occur) normally produced in your small intestine that’s used to digest lactose. If you have a lactase deficiency, it means your body doesn’t produce enough lactase.

Detailed explanation-3: -A lack of the enzyme leads to lactose malabsorption, which results in unpleasant digestive symptoms. Lactose intolerance is not the same as a milk or dairy allergy.

Detailed explanation-4: -Lactase is a disaccharidase enzyme present in the brush border of the small intestinal mucosa that breaks down milk sugar into glucose and galactose so that these can be absorbed [16].