Digestion and Absorption 0.0 / 5 ? BiologyHuman PhysiologyInternational BaccalaureateNone Created by: anna10gCreated on: 16-01-18 15:50 List the parts of the GIT in the order of digestion Mouth, Oesophogus, Stomach, Deodenum, Ileum, Large intestine, Rectum 1 of 23 What is the enzyme found in the mouth and what is its function? Salivary amylase, to digest starch 2 of 23 Term for wave of muscle contractions Peristalsis 3 of 23 Term for 'ball of food' bolus 4 of 23 What is the enzyme found in the stomach and what does it digest? Pepsin, proteins 5 of 23 Where does bile from the gall bladder enter the GIT? Deodenum 6 of 23 What enzymes are found in the deodenum, and what do they digest? Pancreatic amylase - carbohydrates, lipase - fats, Trypsin - polypeptides 7 of 23 What is the function of the ileum? To absorb nutrients into the blood via the villi 8 of 23 What is the function of the large intestine? to reclaim water, leaving semi solid faeces 9 of 23 Term for when faeces is forced out of the anus Egestion 10 of 23 Term for the gastric fluids and partially digested food which passes from the stomach into the deodenum Chyme 11 of 23 How does peristalsis work? Longitudinal muscles in front of the bolus/chyme/faeces contract, giving it space to move. Circular muscles behind it contract, pushing it forwards 12 of 23 Term for the inner lining, including the villi, of the ileum Mucosa 13 of 23 What is Submucosa? connective tissue in between the mucosa and muscle layer 14 of 23 How is the surface area increased in the ileum? many villi and micro villi 15 of 23 How is a short diffusion path created in the ileum? capillaries close to epithelium, single layer of epithelial cells 16 of 23 How does a rich blood supply aid absorption in the villi? Maintains concentration gradients between the blood and lumen 17 of 23 How does the presence of lacteals aid absorption in the villi? close to surface, allow rapid absorption of lipids 18 of 23 Term for the movement of digested food molecules into body cells to be used Assimilation 19 of 23 Which enzymes break down which starches, and what do they produce? Amylase - 1,4 bonds (produces maltose), Dextrinase - 1,6 bonds (produces glucose monomers), Maltase - maltose (produces glucose monomers) 20 of 23 How is glucose transported into the villus? Co-transported with sodium ions into epithelial cells 21 of 23 How is glucose transported into the villus lumen? Facilitated diffusion 22 of 23 What can be used to model absorption? Visking tubing and cola 23 of 23
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