Digestive enzyme reactions examples,probiotics pills work,probiotics pregnancy category hydroxyzine - Videos Download

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The suffix ‘-ase’ is used with the root name of the substance being acted upon, for example,  when sucrose (sugar) is digested, it is acted upon by an enzyme called sucrase. The type of chemical reaction involved as the enzyme functions, for example, when sucrase acts on sucrose, it breaks it into a molecule of glucose and a molecule of fructose. The following pathway summarises how starch present in a food like bread is broken down chemically into glucose, which can then be absorbed through the intestinal wall and into the bloodstream for transport to the liver and from there to other parts of the body.Mouth and duodenumStarch hydrolysed into maltose through the action of the enzyme amylase. The diagram to the left is of the alimentary canal also known as the digestive tract and also shows other organs of the digestive system like the liver.
After being swallowed, the food travels down the Oesophagus or esophagus, this is continually being damaged by the friction of food, so the epithelium is a few cells thick and secretes mucas to lubricate the food's passage. The next place it enters is the stomach this is a temporary store, mixes the contents up and also is the site for a bit of digestion. Enzymes are sensitive to temperature and pH, these must be at an optimum level so they work best.
Below is a digram of the human gut wall, on the right are labelled the different layers that exist.
The first actual layer is the mucosa, it has a layer of epithelium, made of epithelial cells, which have projections called villi. Below this is a muscle layer, known scientifically as the muscularis externa, it is reponsible for peristalsis which moves food through the digestive tract. In the diagram you should also notice the capillaries, part of the blood network which takes absorbed food away. By the time everything reaches here, the food has been digested into small enough particles that it can pass through the alimentary tract lining and be absorbed into the blood.
The food products pass into the blood stream through villi: these are small foldings of the small intestine that cover on its internal surface.


The villi on their own increase the surface area, but the cells which make up the surface of the villus have their own small projections called microvilli (see diagram) these further increase the surface area which means that the digestion products can be absorbed more quickly. The villus has a supply of blood vessels this means substances absorbed can be transported to where they are needed more directly. Triglycerides are a type of lipid; here you will learn how the body breaks down this molecule.
Digestion begins in the duodenum where bile enters from the liver, bile salts make the big blobs of fat into small micelle droplets which massively increases the surface area and makes digestion much easier. Also in the duodenum, pancreatic lipase this breaks the triglyceride into fatty acid and glycerol.
These resynthesised lipids make proteins called chylomicrons, these enter the lacteals and travel through the lymphatic system, making it milky. Digestive enzymes speed up the breakdown (hydrolysis) of food molecules into their ‘building block’ components. This reaction involves adding a water molecule to break a chemical bond and so the enzyme is a hydrolase.
All digestive enzymes are hydrolases, whereas most of the enzymes involved in energy release for muscular contraction are oxidation-reduction enzymes such as oxidases, hydrogenases and dehydrogenases.Chemical structure of enzymesEnzymes are large protein molecules, all of which have their own specific 3D shape.
Proteases: Protein-digesting enzymes added to detergent to remove protein stains from clothes.
Embedded within the shape is a region known as the ‘active site’, which can attract other suitably shaped molecules to bind to the site. The analogy that is often used to describe this mechanism is that of a key fitting into a lock.
If a solution of sugar is left in a sealed container, it breaks down into glucose and fructose extremely slowly. In the presence of a small amount of the enzyme sucrase, the rate of breakdown is millions of times faster.Sometimes, chemical substances other than substrates can bind with the active sites of enzymes, blocking their normal function.


For example, water-soluble compounds of arsenic and mercury are extremely poisonous because they can permanently bind to some enzyme systems, markedly reducing their efficiency. Depending on the dose, the end result could be death.Digestive enzymesDigestive enzymes all belong to the hydrolase class, and their action is one of splitting up large food molecules into their ‘building block’ components.
Another unique property is that they are extracellular enzymes that mix with food as it passes through the gut. The majority of other enzymes function within the cytoplasm of the cell.The chemical digestion of food is dependent on a whole range of hydrolase enzymes produced by the cells lining the gut as well as associated organs such as the pancreas.
The end goal is to break large food molecules into very much smaller ‘building block’ units. Having a body that is overweight, and not appealing YOU can be frustrating, where some people are just .
David Minkoff is an excellent doctor and one I recently interviewed on the radio- who also addresses weight issues to rave success. Internet Marketing Services by Studio98 XHTML CSS All material on this website is provided for your information only and may not be construed as medical advice or instruction. No action or inaction should be taken based solely on the contents of this information; instead, readers should consult appropriate health professionals on any matter relating to their health and well-being.
The information and opinions expressed here are believed to be accurate, based on the best judgment available to the founders and authors, and readers who fail to consult with appropriate health authorities assume the risk of any injuries.



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