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... Prebiotics FOS & MOS – Prebiotics promote the growth of friendly gut bacteria that in turn reduce the build-up of harmful bowel flora. Natural Dietary Antioxidants – A special blend of antioxidant vitamins, minerals and plant extracts to help to protect the body from the damage caused by free radica ...
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... (irreversible, the enzyme for acetoacetate => acetyl-CoA is not found in liver cells) - These products are water soluble (unlike fatty acids and triglycerides) and are exported from the liver to extraheaptic tissues (esp. brain, skeletal and cardiac muscle) for ultilisation - They convert the β-HB = ...
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... are regulated • the first committed step is too slow to permit its substrate and product to equilibrate • most of other reactions in a pathway function close to equilibrium • committed step = rate-limiting step ...
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... This process produces CO2 and alcohol, along with a small amount of ATP This process is used in baking and to produce alcoholic beverages. ...
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... (a) Fructose and water (b) Glucose and carbon dioxide (c) Alcohol and CO2 (d) Water and CO2 2. The most readily available source of energy in a cell is (a)ADP (b) ATP (c) Glucose (d) Sucrose 3. In fermentation (a) Energy is consumed (b) Energy is liberated (c) Energy is neither consumed nor liberate ...
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Digestion



Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into the watery blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream. Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion. The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes. In chemical digestion, enzymes break down food into the small molecules the body can use.In the human digestive system, food enters the mouth and mechanical digestion of the food starts by the action of mastication (chewing), a form of mechanical digestion, and the wetting contact of saliva. Saliva, a liquid secreted by the salivary glands, contains salivary amylase, an enzyme which starts the digestion of starch in the food; the saliva also contains mucus, which lubricates the food, and hydrogen carbonate, which provides the ideal conditions of pH (alkaline) for amylase to work. After undergoing mastication and starch digestion, the food will be in the form of a small, round slurry mass called a bolus. It will then travel down the esophagus and into the stomach by the action of peristalsis. Gastric juice in the stomach starts protein digestion. Gastric juice mainly contains hydrochloric acid and pepsin. As these two chemicals may damage the stomach wall, mucus is secreted by the stomach, providing a slimy layer that acts as a shield against the damaging effects of the chemicals. At the same time protein digestion is occurring, mechanical mixing occurs by peristalsis, which is waves of muscular contractions that move along the stomach wall. This allows the mass of food to further mix with the digestive enzymes.After some time (typically 1–2 hours in humans, 4–6 hours in dogs, 3–4 hours in house cats), the resulting thick liquid is called chyme. When the pyloric sphincter valve opens, chyme enters the duodenum where it mixes with digestive enzymes from the pancreas and bile juice from the liver and then passes through the small intestine, in which digestion continues. When the chyme is fully digested, it is absorbed into the blood. 95% of absorption of nutrients occurs in the small intestine. Water and minerals are reabsorbed back into the blood in the colon (large intestine) where the pH is slightly acidic about 5.6 ~ 6.9. Some vitamins, such as biotin and vitamin K (K2MK7) produced by bacteria in the colon are also absorbed into the blood in the colon. Waste material is eliminated from the rectum during defecation.
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