A deep understanding of chemistry is essential to anyone interested in modern biological sciences or medicine, so I really encourage you to take the time to work though all of the chemistry material. That may look like a lot of work, but you've probably watched many of the videos already under "Chemistry of life". If you are not familiar with reduction and oxidation states, then I encourage you to start working through the Chemistry material on KhanAcademy: amino acids (that make up protein) or fatty acids (that make up fats). How many moles of carbon are present in a gram of glucose (a "typical" carbohydrate)?ĭo the answers to those two sets of questions help you answer your question? Food is broken down by the digestive system to give energy to every cell in the. Bile, which is made in the liver and stored in the gallbladder, is released into the duodenum, the first section of the small intestine. How many moles of carbon are present in a gram of tetradecane - a 14 carbon alkane (a reasonable comparison for the tails of the fatty acids found in food)? Lipid Digestion in the Small Intestine As the stomach contents enter the small intestine, most of the dietary lipids are undigested and clustered in large droplets. After ingested triglycerides pass through the stomach and into the small intestine, detergents called bile salts are secreted by the liver via the gall bladder and disperse the fat as micelles. How would you expect this to affect a oxidative process like cellular respiration? Fat digestion starts in the stomach via acid-resistant gastric lipase however, the majority of fat digestion occurs in the small intestine via pancreatic. How does this compare with the oxidation state of the carbon in carbohydrates (the other group of macromolecules that are often used to store energy)? What is the oxidation state of the carbons in the fatty acid tail? Therefore, I'm going to ask you some questions in response to help you figure out (some of) the answers yourself. Pancreatic lipase breaks down each triglyceride into two free fatty acids and a monoglyceride. However, because the pancreas is the only consequential source of lipase, virtually all lipid digestion occurs in the small intestine. Lipids are digested to fatty acids and glycerol Substances that are not digested Minerals, vitamins and water are already small enough to be absorbed by the body without being broken down, so. This is a good question, but one that I think you have enough information to answer on your own. The three lipases responsible for lipid digestion are lingual lipase, gastric lipase, and pancreatic lipase.
0 Comments
Leave a Reply. |