Lactose - What Is Lactose - What Is Lactose Intolerance скачать в хорошем качестве

Lactose - What Is Lactose - What Is Lactose Intolerance

In this video we look at what is lactose, what is lactose intolerance, and how is lactose digested in the body. Transcript (partial) Lactose is a simple carbohydrate, or what is called a disaccharide. It is made up of a glucose molecule joined with a galactose molecule. It is found mainly in milk, cheese, yogurt and sour cream, however it is sometimes added to baked goods and salad dressings. After we eat foods that contain lactose our body has to digest and absorb it. Virtually no digestion of lactose takes place in the mouth, stomach or first part of the small intestine. Digestion of lactose takes place within the microvilli in the upper small intestine. In the small intestine, there are tiny finger like projections called villi. These villi consist of hundreds of intestinal cells called enterocytes, which are covered with projections called microvilli. In this microvilli is an enzyme called lactase. This fella has one job, to break apart lactose into glucose and galactose. Once mr. lactase has done his job, glucose and galactose can be absorbed into the enterocyte and sent to the liver. The liver will send glucose to cells to use as energy, store it as glycogen or store it as fat. Galactose is converted to glucose and then follows the same pathway as just mentioned. So, now, what is lactose intolerant? In many people lactose intolerance occurs with age, as the small intestine makes less lactase. As this happens, the small intestine does not digest lactose, so it enters the large intestine undigested. In the large intestine, lactose is fermented, or broken down by bacteria, which releases a lot of gas causing cramping, flatulence and diarrhea. It is estimated that about 65% of people suffer from lactose intolerance. And that be the basics on lactose and lactose intolerance. Timestamps 0:00 What is lactose and the structure of lactose 0:20 How is lactose digested? 1:07 What is lactose intolerance?