Duodenum

  Duodenum

·        This is the first 25 cm of the small intestine

·        Where ducts from liver and pancreas join info into the duodenum in a single duct

·        Receives bile from liver, and pancreatic juice; bile is produced in the liver.

   Bile

·        This is how we emulsify fat

·        Emulsification- cause large fat droplets to disperse in water

·        Bile s a mechanical digestive process

·        This is mechanical because bile physically rips the fat apart

·        Bile aids the digestion and absorb the fats

 The Duodenum Recieves Pancreatic Juice

·        Pancreatic juice contains sodium bicarbonate (NaHCo3), which neutralizes chime. Thick semi liquid, acidic, food material that passes from the stomach to the small intestine and it has a slightly basic pH around 8

·        First job: juice helps protect the rest of the small intestine from the acidity of chime

·        Pancreatic amylase digests starch into maltose

·        Tryspin breaks down proteins into peptides

·        Lipase digests fat into fatty acids and gycerol

·        Nuclease  breaks down RNA + DNA into Nucleatide

   Small intestine

·        Maltase [Maltose + H2O à Glucose + Glucose]

·        Peptidases [Peptide + H2O à Amino Acids]

·        Nucleotidases  [Nucleotide + H2O à Base + Sugar + Phosphate]

    Enzymes and Hormones

·        The duodenum is responsible for hormones that trigger the pancreatic duct to open pancreatic juice and bile