EXSS2021 Lecture Notes - Lecture 3: Portal Vein, Blood Sugar, Amylase
4 Sep 2018
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> food in mouth > chew to combine with saliva (increase surface area so enzymes can digest it easier, softens it) > goes down esophagus - propelled by peristalsis > food goes into stomach - very acidic (ph 1-3) Liver: makes bile which is stored in the gall bladder. Stomach - stomach acid inactivate amylase - halts carb digestion. Small intestine - pancreatic amylase breaks up starch from disaccharides to monosaccharide. >monosaccharides travel to the liver via portal vein > galactose and fructose can be converted to glucose in the liver > blood glucose circulates in blood. Maintained by insulin (moves glucose from blood into stores) and glucagon (moves glucose from cells into blood) Insulin - brings blood glucose levels down. Triglyceride = 3 fatty acids, on glycerol backbone. Mouth - hard fats melt at body temperature, saliva releases lipase = digestion. Small intestine - hormone cck signals bile from gall bladder to release it to emulsify.
