Absorption Defecation Salivary Digestion SALIVARY DIGESTION Salivary Glands the salivary glands are a collection of accessory organs surrounding the mouth that secrete a fluid called saliva. Saliva consists of 99.5 % water and 0.5 % solutes. medium for dissolving soluble food molecules solutes include mucus and enzymes one enzyme (lysozyme) destroys bacteria second enzyme known as salivary amylase‚ begins the chemical digestion of starchy foods. produced by three pairs of salivary glands parotid
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Chemical and Physical Processes of Digestion exercise T 8 he digestive system is a physiological marvel‚ composed of finely orchestrated chemical and physical activities. The food we ingest must be broken down to its molecular form for us to get the nutrients we need‚ and digestion involves a complex sequence of mechanical and chemical processes designed to achieve this goal as efficiently as possible. As food passes through the gastrointestinal tract‚ it is progressively broken down
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The Relationship between Gene Copy Number‚ Amylase Concentration‚ and Gene Evolution Matthew Fantauzzi 400007178 Shawn Hercules - L15 25 November 2015 Abstract In this lab‚ students were experimenting to determine if a relationship exists between gene copy number‚ amylase concentration‚ and gene evolution. At the same time‚ this lab was designed to introduce university freshman to the etiquette and conventions used in a formal research setting. The methods used ranged from sample production
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questions refer to Activity 1: Assessing Starch Digestion by Salivary Amylase. 1. At what pH did you see the highest activity of salivary amylase? Why? 2. How do you know that the amylase did not have any contaminating maltose? 3. What effect did boiling have on enzyme activity? Why? 4. Describe the substrate and the subunit product of amylase. The following questions refer to Activity 2: Assessing Cellulose Digestion. 5. Does amylase use cellulose as a substrate? Explain.
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are two enzymes found in the saliva of the mouth‚ salivary amylase and lingual lipase. Amylase breaks down dietary carbohydrates such as monosaccharides‚ disaccharide sugars and complex polysaccharides (starch). Monosaccharide’s can be easily absorbed into the bloodstream so the others need to be broken down into these before they can be absorbed (Derrickson‚ Tortora 2006 p906). The salivary amylase starts to break down the polysaccharide starch found in the bread of sandwich and the rice in the
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tongue and salivary glands. Hoebler et al. (1998) stated that the food was break down into smaller pieces by using teeth‚ tongue and saliva. In the mouth‚ teeth act as a tool that mechanically reduced size of food into small pieces. However‚ the tongue manipulates food bolus by pushing it for swallowing (Hoebler et al.‚1998). The last part of the oral cavity is salivary glands. In the salivary glands‚ it secretes saliva. Furthermore‚ enzyme that contain in the saliva is salivary amylase (common form
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Amylase is found in saliva and breaks starch into maltose and dextrin. This form of amylase is also called "ptyalin" /ˈtaɪəlɪn/[4] It will break large‚ insoluble starch molecules into soluble starches (amylodextrin‚ erythrodextrin‚ and achrodextrin) producing successively smaller starches and ultimately maltose. Ptyalin acts on linear α(1‚4) glycosidic linkages‚ but compound hydrolysis requires an enzyme that acts on branched products. Salivary amylase is inactivated in the stomach by gastric acid
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as waste. The whole process involves many different organs and sometimes takes several hours. There are four stages of digestion:- Mouth: ingestion (taking in of food or liquid into the body)‚ chewing and swallowing this is the starch of digestion. Stomach: mixing and protein digestion Small Intestines: carbohydrates and fat digestion abortion Large intestine: waste and excretion Reference: http://en.wikipedia.org/wiki/Digestive_system
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ON THE RATE OF ENZYME ACTIVITY. To investigate the effect that temperature has on enzyme activity I am going to use the enzyme amylase‚ which is used as a biological catalyst to break down starch‚ which cannot pass through the gut wall due to the size of the molecules‚ into smaller ones. Amylase is a carbohydrase‚ which converts starch to simple sugars in the Salivary Glands. Three features of all enzymes are: They are always proteins. They are specific in their actions and each enzyme controls
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Ye Tao BISC220-13155 The Effect of Temperature on the Digestion of Starch by Activity of Enzyme α-Amylase: Observation of Rate of Starch Disappearance through Iodine Test Introduction An enzyme is a type of protein that‚ through its own structure including hydrogen bonds‚ acts like a biological catalyst and is able to accelerate the biochemical reaction rate by lowering the activation energy of the whole process‚ without which cells could hardly practice any physiological functions within human
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