secretions involved tomach and large intestine focusing on the digest veenzymesa
ID: 240280 • Letter: S
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secretions involved tomach and large intestine focusing on the digest veenzymesand (3 to digestion inhocess in detail of digestion of 1 cup of cooked oats porridge with respect secretions involved and the products ordig Describe the process in detail of digestion to digestion in the large rv n digestion that is formed. 1.7 For which parts of he body is glucose preferred as the body is glucose preferred as the source of energy? etentale between gastic juice, pancreatic juice and intestinal juice by discussing the (8 target organ in each which these digestive secretions are secreted and the major actions th of these digestive secretions, respectively. 9 Explain what causes symptoms of lactose intolerance. lactose intolerance and describe how it results in the typica anExplanation / Answer
1.6 PROCESS OF DIGESTION IN THE STOMACH AND LARGE INTESTINE :
STOMACH :
The stomach is a J shaped dilated portion of the alimentary tract situated in the epigastric, umbilical and left hypochondriac regions of the abdominal cavity. After the process of mastication and deglutition, the cooked oats will reach the stomach, and the Rugae which is the mucous membrane lining in longitudinal folds, It allows the food content to move forward, the stomach contains many gastric glands which is located below the surface in the mucous membrane and open on to it. They consist of specialised cells that secrete gastric juice into the stomach, Gastric juices such as Hydrochloric acid which acidifies and stops the action of salivary amylase,kills ingested microbes, and provides acid environment needed for effective digestion by pepsins, Pepsinogens are activated by hydrochloric acid and by the pepsins already present in the stomach, Intrinsic factor which is a protein, is necessary for absortion of vitamin B12 from the ileum and mucus which basically prevents any mechanical injury in the stomach by lubricating the contents. The food is then mixed with the gastric juice takes place gradually and it may be some time before the food is sufficiently acidified to stop the action of salivary amylase. The activity of gastric muscles consists of a churning movement that breaks down the bolus which is a food content mixes it with gastric juice, and paristaltic movement that propel the stomach contents towards the pylorus. When the stomach is active the pyloric sphincter closes. Strong peristaltic contraction of the pylorus forces chyme (which is a half digested bolus along with the gastric juices), gastric contents after they are sufficiently liquefied, through the pyloric sphincter into the duodenumin small spurts.
LARGE INTESTINE :
Large intestine is divided into the Caecum , the colon, sigmoid colon, rectum and anal canal. After the food content passes throught the small intestine, it reaches the large intestine, while most of the water has been absorbed in the small intestine, In the large intestine absortion of water by osmosis, continues until the familier semisolid consistency of faecesis achieved. Mineral salts, vitamins and some drugs are also absorbed into the blood capillaries from the large intestine. The large intestine contains certain types of bacteria, which produces vitamin K and folic acid, however the bacteria are normally harmless, in humans. The large intestine does not exhibit peristaltic movement as in other parts of the digestive parts of the digestive tract. However at fairly long intervals about twice an hour does a wave of strong peristalsis sweep along the transverse colon forcing its contents into the decending and sigmoid colons. This is known as mass movement and it is often precipitated of stimulus and response is called the gastrocolic refle, due to mass movement the contents are forced towards the sigmoid colon then into the rectum.
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