Functions of liver 1 manufacture bile 2 store excess

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FUNCTIONS OF LIVER 1) Manufacture bile 2) Store excess glucose as glycogen (excess glycogen is turned into fats) 3) Interconversion of glucose and glycogen to keep glucose level in blood constant 4) Transamination = Interconversion of different amino acids 5) Deamination = excretion of excess amino acid in the form of urea (excreted in urine) 6) Removal of old red blood cells 7) Detoxification = Breakdown of alcohol and other toxin ASSIMILATION = process of moving food molecules into the cells to be used Each type of cells uses food molecules for different purposes. Muscle cells take certain proteins to make muscle Bone cells take calcium and phosphate All cells take glucose to produce energy via respiration EGESTION : removes undigested food Dietary Fibre: Includes cellulose of cell wall & lignin in plants Leftover water is reabsorbed in the gut When rectum is full reflex action of muscle contracts to squeeze faeces out of anus Sphincter at anus prevents defaecation at an inconvenient time Xtra Info: *DIGESTIVE JUICES - contains mucus that helps protect the gut from being digested by its own enzymes - are largely made up of water that: o acts as a solvent o medium for biochemical reaction of digestion o used in the hydrolysis reactions that split up food molecules
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7.5 Absorption 1. Identify the small intestine as the region for the absorption of digested food 2. Explain the significance of villi and microvilli in increasing the internal surface area of the small intestine a.
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