The Digestion Of A Chicken Sandwich Biology Essay

The Digestion Of A Chicken Sandwich Biology Essay Throughout this essay the digestion of a chicken sandwich will be explained with reference to five different points; the need for digestion, physical digestion with regards to muscular and nervous involvement and chemical involvement, hormone and enzyme action, how each enzyme acts on each part of the sandwich, the tissues and lining of the digestive tract and, finally, how each part of the chicken sandwich is digested and absorbed. The third and fifth point will be combined and explained together as the essay takes a journey through the digestive system. The need for digestion is vital to the human bodys survival. When food first enters the body it is a solid form that cannot be digested, so the mouth begins the digestion process by releasing digestive juices and using teeth to chew and break down the food into a more liquid based form. As it moves down the digestive tract it is broken down even more into molecules that can be absorbed and taken to cells around the body for energy, reproduction and to strengthen them. There are many features of digestion and these are split into two categories; physical digestion and chemical digestion. In physical digestion there are two factors that contribute to the digestion of food; muscular and nervous involvement. The muscular involvement begins in the mouth, more specifically with the tongue, which assists in the chewing of food and eventually forces food down into the oesophagus. Along with the oesophagus, the other organ in the digestive tract have a muscle layer underneath them which makes their walls to move which in turn forces the food down with a wave like action. This wave like action is called peristalsis'(Potter, S. 2008. AQA Biology, Phillip Alans Updates). This forces the food won the tract and through the digestive organs by the muscles contracting which makes a narrow section, as the muscle keeps contracting it forced the food in a propelling fashion downwards towards its next destination; the stomach. When the food has almost reach the stoma ch, the ring like muscle called the gastroesophageal sphincter'(Jim Swan, 2006., The Digestive Sytsem) which opens and lets food through then closes behind it to stop too much food entering the stomach, almost like a door. Once the food has entered the stomach the stomach muscles mix the partially digested food and the juices the stomach has produced. The stomach also uses its upper muscles to store food and also helps to empty the stomach into the small intestine. Once in the small intestine the food, which is now in a small enough form, is absorbed into its walls and is taken and distributed around the body. The waste products of the food are then forced into the colon where they wait until they can be pushed out of the body as faeces. Nerves are what makes the muscles contract and force the food through the digestive tract. There are two different types; extrinsic and intrinsic. The extrinsic nerves are the outside nerves; these nerves control the muscles in the organs in the digestive tract. They are produced by the brain and spinal cord and they let out two chemicals; acetylcholine and adrenaline. The acetylcholine is the chemical that causes the muscles to contract and the adrenaline makes them relax and eventually stop the process of digestion. The intrinsic nerves are the inside nerves and these lie in the walls of the organs of the digestive tract. Their main function is to release substances that start, control the speed and stop the production of enzymes that digest food. In chemical digestion there are also two factors that contribute; hormones and enzyme action. There is a layer in the stomach and small intestine called the mucosa, in this layer are cells which produce and then release hormones which also, along with muscles and nerves, control digestion. There are five different hormones, all of which have their own unique jobs within the process of digestion; Gastrin makes the stomach produce acid for the digestion of food and for dissolving them, CCK allows the pancreas to make pancreatic juice which holds enzymes that help break down molecules, and Secretin, this is the hormone has the most tasks of all three, its first job is to make the pancreas produce a juice that is full of bicarbonate which will neutralize the stomach acid, its second job is to make the stomach produce pepsin which digests protein and finally its third job is to make the liver produce bile. The other hormones are slightly different, they stimulate and regulate appetite; Gh relin stimulates appetite and is made in the stomach and upper intestine which is regulated by the absence of food, and Peptide YY is the response produced by a meal in the system and inhibits appetite. The action of an enzyme is to break down molecules so they can be dissolved and carried through the body. Each enzyme is specifically designed for only one substrate. The enzyme and the substrate fit together, like and lock and key, and the enzyme alters the substrate into products which are then released to be absorbed into the blood stream, after this the enzyme can react again but only with the same type of substrate. When the chicken salad sandwich first enters the mouth the salivary glands produce a digestive juice called salivary amylase which begins to break down or hydrolyse the starch which is in the bread of the chicken salad sandwich. Amylase breaks down carbohydrates, more specifically the starch in the carbohydrates and changes it into maltose; this is a more acceptable form that the body can absorb. As the chicken salad sandwich continues its journey it enters the stomach where it is stored. In the stomach the acid denatures the amylase enzyme which stops it from working. Once the food has moved from the stomach to the small intestine, the pancreatic amylase, which is produced in the pancreatic juices, continues the breakdown of the starch in the bread of the sandwich to a substance called maltose. As the food is further pushed along the small intestine it produces maltase which breaks down the maltose into an even smaller molecule called glucose. The chicken in the sandwich starts to b e broken down in the mouth where it is chewed to make smaller pieces. When it reaches the stomach it begins the hydrolysis process, the stomach produces an enzyme called pepsin, and this partially breaks down the proteins into amino acid. This then travels to the small intestine where the chicken is further broken down by an enzyme called trysin which continues the breakdown of proteins to amino acids. The butter in the chicken salad sandwich is solely broken down in the small intestine into emulsified fats and fatty acids by enzymes produced in the liver and pancreas called bile and lipase. The lettuce in the chicken salad sandwich cannot be broken down as it is a fibre, so it passes through the system by being chewed into smaller parts and the water is absorbed through the intestinal walls, and ends its journey by leaving the body in the faeces, along with all the other waste products from the chicken sandwich. The end products of the chicken sandwich, sucrose, amino acids, emulsi fied fats and glycerol/fatty acids are absorbed through the intestinal wall. There is a layer of mucosa that lines the wall that consists of folds which are full of villi which are then covered with microvilli which increases the surface area dramatically. It is through this surface area that the nutrients are absorbed and because of this the amount and rate of absorption is increased. The organs of the digestive system are the mouth, pharynx, oesophagus, stomach, small intestine, large intestine, rectum and the anus. There are three main parts of the mouth, the lips which are made out of stratified squamous keratinized epithelium, stratified squamous non keratinized epithelium, skeletal muscle, and fibroelastic connective tissue'(http://lifesci.rutgers.edu/~babiarz/digest.htm). The tongue is made out of skeletal muscle, glands, lymphatic tissue and epithelial tissue'(http://lifesci.rutgers.edu/~babiarz/digest.htm), and the teeth are made primarily out of calcified connective tissue. There are three tissues that make up the oesophagus; skeletal tissue, stratified squamous non keratinized epithelium and smooth muscle. Moving down to the stomach, it is apparent that it is also made of three types of tissue, these are smooth muscle, glands and epithelium. After the stomach comes the small and large intestine which are made up of simple columnar epithelium, which is th e tissue that makes up the villi and the micro villi, and the large intestine is made out of epithelial tissue. Finally, comes the rectum and the anus, the rectum contains simple columnar epithelium and the anus is made with stratified squamous epithelium. The digestive system is a vital part of everyday life for the human body, it breaks down food to a form that can be absorbed by the body which gives us energy and everything we need. It works in such a way that it pulls all the vital nutrients from the food, absorbs them and then transports them around their body. Enzymes like protease and amylase play a major part in the digestion of food and are the juices that hydrolyse the food we eat. There are many other factors that work alongside the enzymes that all play a significant role in the digestion of food; muscular and hormone involvement, and nerves, and they all work together so that we as human being can survive, and play this roll in such a way that it is an unconscious act that we very rarely need to think about.

Religion in Society Essay -- Essays Papers

Religion in Society Miriam, Deborah and Huldah all are names of prophets from the Bible; they also all happen to be women. There are even two books in the Bible about women, Esther and Ruth. Psalm 68:11 reads, "The Lord gives the command; the women who proclaim the good tidings are a great host." With all of this support for women, why are they treated as the inferior sex in the church? The article, â€Å"Women and Gender; Reading the Bible through the Eyes of Women,† states that it is â€Å"crucial that women have the same opportunities and freedom of expression as men in the Church, so that the entire community may benefit from their contribution.† However, many churches do not allow women to play a role in the services, and most do not allow there to be a woman priest or pastor. Lori Beamen points out that fact that, â€Å"Although women frequently do the same work as men, they are denied the authority that accompanies those tasks when performed by men.† Statistics even show that 69.9% of women attend church more often than once a year opposed to 58.2% of men. So how can women put in so much time and do all of this work, and still be denied authority? Even though there are instances in the Bible that support women, many people use the Bible to limit women’s roles in the church and to show women are inferior in general. Some feel that since Adam was created first, and it was Eve who was responsible for the eating of the fruit, men are superior. However, the Women and Gender article notes that â€Å"When God told Adam and Eve to be fruitful and multiply, He did not talk to Adam alone. He addressed the two of them together as two equals, to whom He gave a common task. And that is exactly what partners are: two people who are equ... ...r verse. Paul writes in Galatians 3: 28-29, â€Å"There is neither Jew nor Greek, slave nor free, male nor female, for you are all one in Christ Jesus. If you belong to Christ, then you are Abraham’s seed, and heirs according to the promise.† The role of women was enhanced by Christianity and faith in Christ transcends differences and makes all believers one in Christ. Nobody is more superior than the other and if we all remember that, the better the church will function as a whole, no matter if the teachers are male or female. Bibliography African Church Information Service (2003, December 1). â€Å"Women and Gender; Reading the Bible through the Eyes of Women.† AllAfrica, Inc. Beamen, Lori. Introduction. (2004) Sociology of Religion. Wallace, Ruth A. â€Å"The Social Construction of a New Leadership Role: Catholic Women Pastors.† Sociology of Religion, p. 136.

5 Performance Objectives of Wegmans

Performance objectives of Wegmans Today I decided to do my presentation about Wegmans main performance objectives, first of all I will describe what exactly Wegmans Company is and what are 5 objectives of operations. Wegmans Food Markets, Inc. is a privately-held, family owned company that was founded in 1916 by the Wegman family. Based in Rochester, NY, they have raised the bar on the customer shopping experience. The company prides itself on offering exceptional customer service, high quality goods, an abundance of choice, restaurant-quality prepared foods, and beautiful stores and displays.Wegmans has appeared on Fortune's annual â€Å"100 Best Companies to Work For† list since its inception in 1998, and has ranked among the top 10 for eight consecutive years. And about performance objectives I can say that it is a generic set of performance and indicators that can be used to set the objectives or judge the performance of any type of operation. There are 5 main performance objectives: Quality – â€Å"Doing things right†. Quality is very important aspect for customer satisfaction or dissatisfaction, it's all about providing error free goods and services.Speed – â€Å"Doing things fast† to minimize the time between the order and the availability of the product or service that gives the customer a speed advantage. Dependability –â€Å"Being on time†, means that customers will get their goods and services when they are promised. Flexibility – â€Å"Changing what they do†. It's about that organizations can change their products and services and change the way they do business. Cost – â€Å"Doing things cheaply†. Low price is a universal attractive objective to customers, which can be achieved by producing goods at lower costs.Let’s begin discussion about Wegmans performance objectives. Quality as I already said is most important from these five and of course it’s important for this company as well. The most important thing employers are doing is prevent problems from occurring in the first place by carefully partnering with suppliers who understand their expectations. Be it a grower, a Wegmans brand manufacturer or a seafood supplier, company makes it its business to know suppliers well, visiting their fields or facilities whenever possible.If a supplier is making a product for Wegmans lebel, they must either be inspected by Wegmans' own Quality Assurance Auditors or must be certified against one of seven â€Å"Global Food Safety Initiative (GFSI)† endorsed manufacturing standards. The first shipment of any new Wegmans brand product is scrutinized by company's Quality Assurance staff to be sure it meets product specifications and food safety requirements. Tests are conducted in Wegmans Test Kitchen lab, or if necessary, by independent laboratories. Additional sampling and testing is done periodically, sometimes prompted by customer or employee comments.Company also pays attention on friendly environment. Each store manager sets the tone for the warm, friendly work environment that employees expect when they work for Wegmans. And in turn, employees greet their customers with warm, friendly, helpful attitudes, which is crucial for any business whose employees regularly interact with customers. So as we can see Company cares much about safety and high quality of products, because the owners of the business know well that high quality can influence customer satisfaction and lead to stable and efficient processes.For Wegmans Company it is very important to produce services and goods as fast as possible, and for this they are doing their best. As we know for fast production it's important to have very good, qualified employees and good, modern technologies. So Wegmans company cares much about staff which works there, Wegmans’ Chairman Robert Wegman state that: â€Å"Respect, fairness, honesty, and concern are whatâ€⠄¢s important to people. To my way of thinking, the only way to achieve great customer service is by treating employees right.They have qualified employees in technic and production departments and also they have different training programs for providing better performance of the staff. Wegmans puts a huge emphasis on being an innovator in retail technology. In 1974, Wegmans was one of the first companies to introduce bar-code scanning, and in 1990 Wegmans introduced electronic discounts. The company launched its web site, wegmans. com in 1996. The site not only helps customers save time and money through its on-line ad, but also offers meal solutions, recipes, and even provides the ability to apply for jobs within the company.According to all these company is providing fast production and this is a huge way for the company success. Dependability is extremely important factor for customer trust and satisfaction, as i checked Wegman's has strong position in it too. Customers are much satisfied how fast the company delivers its products, they love to go for shopping in Wegmans, some of them even said that: â€Å"A trip to Wegman's is better than a trip to an amusement park†. All these is caused because firm provides additional ervices such as internet shops, which means that you can check out Wegmans products and services online, and even buy there, so save time by this, they also have recipes how to cook many different type and delicious food, they even provide these service by internet, if you go on their online page you can see many videos, about how to cook different foods, so as one Wegmaniac put it, â€Å"Shopping at Wegman's is an experience. † In addition to a unique shopping experience, including one-third of the space devoted to prepared foods, with another 15,000 sq. ft. or a liquor department, a 300-seat cafe, 70,000 products and some 30 checkout lanes, Wegmans brought relocated 75 Rochester employees to Massachusetts to ensure customer s are treated the way Wegmans wants them to be treated. As an addition i would like to say that company managers said that for them it's very important to know their consumer base and understand the demand. There's so much diversity in Wegman's markets these days, they need to know who their customers are and give them what they want. They said they have to give them not only what they are familiar with, but also explore other products that might not be a mainstream item.And in their case, that's unique vegetables and fruits. Flexibility helps the firm to change over between tasks quickly and without wasting time and capacity. Wegmans provide good flexibility, as the firm is changing over time, they are doing researches and are changing by customer needs, they can change techniques, operations, they are producing new products, are offering many different services. For example last year they did a research and find out that they can be successful in growing certain varieties of organ ic produce in the northeast.CEO of the firm also said that last year they explored new techniques called a hoop house. It's a metal frame with a plastic cover, and there they grow heirloom tomatoes and it was very successful. Every month they are offering new food products and for special celebration days they have special recipes, for example for thanksgiving day they offer which Turkey to choose, how to cook it, with what ingredients and so on, all these staff is very likable for customers and that's a another factor why it is so popular.And the final objective cost is described For Wegmans as follows, they are trying in all ways to keep medium costs and at this time keep all the customers as well. They are doing this very well, because they have many tools for this, for example at a time when commodity and fuel costs are rising dramatically, Wegmans Food Markets announced that it will not increase prices on 40 products that families buy most, to help customers and employees manag e their grocery costs. â€Å"We considered the importance of an item to a family when choosing our list of 40,† said President Colleen Wegman. Such things as bananas, pasta, frozen vegetables, and laundry detergent are in most shopping carts every week. They are products that families can’t do without, so what they pay for these items really matters. † The 40 products they selected to hold prices on were those that families buy week in and out. They were mostly Wegmans brand. Why? They have better access to information on the factors that determine costs for their own brand. Their quality makes them already the best value in their categories, and they’re often the top-selling brand.Another good example of cost leadrship of Wegmans is that, In November of 2008, many families were feeling the economic shock of their lives as the nation’s financial system teetered, jobs melted away, and household budgets shrank. Wegmans announced a decision to lower hu ndreds of prices on frequently purchased products. If customers and employees were facing leaner times, the company reasoned, Wegmans should also live with leaner times. So by performance objectives described above we can see that Wegmans is successful company and is doing best for its customers.

The Grocery Retailing Industry Free Essay Example, 2000 words

Tesco is currently the largest grocery retailer in the UK and was founded in 1927. J. Sainsbury plc owns Sainsbury s Supermarkets, currently the UK s third-largest retailer, and was founded in 1869. Sainsbury s was the nation s biggest supermarket and undisputed market leader, but a series of strategic missteps allowed Tesco to catch up in 1995. Sainsbury s and Asda, whose combined sales are less than Tesco s, are fighting for second place. The grocery retailing market is described as mature, characterised by a stable population with a limited growth rate of food consumption even though trends vary between food types with the change in demographics (increasing number of single-person households) and customer preferences (increasing awareness of health issues), decreasing food expenditure patterns (more people are eating out), and tight government-drafted planning restrictions that limit new stores. Grocery retailers compete for market share by varying the prices and range of goods s old and the quality of customer service rendered at the point of sales. They also diversify into non-grocery products and services, shift to premium products, enlarge existing stores, and open high-street convenience stores to generate increased sales volumes and higher margins. Given the intense nature of business competition and their closeness to consumers, grocery retailers are doing all they can to manage their supply chains better, improving the sophistication of their sales information, distribution, and stock control systems for both own-label and private-label goods. We will write a custom essay sample on The Grocery Retailing Industry or any topic specifically for you Only $17.96 $11.86/page