Lactase & the Mechanism of Lactose Intolerance

The video explains lactose, a disaccharide found in milk, and its metabolism in infants through the enzyme lactase. It discusses how lactase breaks down lactose into glucose and galactose, which are used for energy and biosynthesis. The video also covers lactose intolerance, a condition where lactase levels drop, leading to lactose accumulation in the intestines. This can cause symptoms like flatulence and diarrhea due to bacterial fermentation and osmotic imbalance.

What is lactose and what are its components?

Explain the role of lactase in the metabolism of lactose.

What happens to lactase levels as humans age?

Describe the mechanism of lactose intolerance.

What are the two fates of lactose in individuals with lactose intolerance?

What gases can be produced by bacterial metabolism of lactose?

How does the accumulation of lactose in the small intestine lead to diarrhea?