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The chyme enter into the duodenum through the pyloric sphincter. The sphincter only allows small amounts of chyme to pass at a time. The duodenum is the first part of digestion where most digestion takes place. The duodenum receives secretions from the pancreas and liver. The arrival of food in the duodenum stimulates the secretion of hormone secretin in the pancreas and cholecystokinin from the duodenal wall. Secretin stimulates production of pancrease juice into the duodenum while cholecystokinin stimulates production of bile from the gall bladder. Pancreatic juice has three enzymes; pancreatic amylase,pancreatic lipase and trypsin. Pancreatic amylase breaks down the remaining starch into maltose while pancreatic lipase breaks down lipids into fatty acids and glycerol. Trypsin breaks down proteins into peptides. Pancreatic juice also contains sodium hydrogen carbonate which neutralizes the acid chyme to create an optimum alkaline medium for the function of pancreatic enzymes. The bile juice contains two salts; sodium taurocholate and sodium glycocholate which break down fats into tiny fats droplets thus increasing surface area for digestion. This process is referred to as emulsification
Faimus answered the question on December 6, 2017 at 20:33
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Date posted: December 6, 2017. Answers (1)
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