chrissy lactose intolerance

chrissy lactose intolerance - Christine Martin Chemistry...

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Christine Martin Chemistry Lactose Intolerance Description - Lactose intolerance is the inability to metabolize lactose, a sugar found in milk and other dairy products, because the required enzyme lactase is absent or its availability is lowered. It is estimated that 70% of adult humans are lactose intolerant. Lactose (disaccharide of -D-galactose & -D-glucose) is normally split by lactase. β β Without lactase, the lactose disaccharide in many dairy products remains uncleaved and cannot be absorbed through the intestinal wall into the bloodstream, so remains in the intestines. Internal bacteria adapt to the relative abundance of this undigested sugar and their operons quickly switch over to lactose metabolism, which produces copious amounts of gas by fermentation. This also causes a range of unpleasant abdominal symptoms, including stomach cramps, bloating, flatulence and diarrhea. As with other unabsorbed sugars (mannitol), the lactose raises the osmotic pressure of the colon contents, preventing the colon from reabsorbing water, thereby adding a laxative effect to the excessive gas production. There are three major types of lactose intolerance:
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This note was uploaded on 04/10/2008 for the course CHEM 1024 taught by Professor Bloxton during the Spring '08 term at Temple.

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chrissy lactose intolerance - Christine Martin Chemistry...

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