Anatomy of the Human Stomach Essay Example

Anatomy of the Human Stomach Essay Example Anatomy of the Human Stomach Essay Anatomy of the Human Stomach Essay The stomach is divided into five sections, each of which has different types of cells and functions. The stomach lies between the esophagus and the first part of the small intestine (the duodenum). It is on the left side of the abdominal cavity, the fundus of the stomach lying against the diaphragm. Lying beneath the stomach is the pancreas, and the greater omentum hangs from the greater curvature. Like the other parts of the gastrointestinal system, the stomach walls are made of a number of layers. Starting inside the stomach (the lumen) going out, the first main layer is the mucosa. This consists of an epithelium, the lamina propria underneath, and a thin bit of smooth muscle called the muscularis mucosa. The submucosa lies under this and consists of fibrous connective tissue. It separates the mucosa from the next layer, the muscularis externa. The muscularis in the stomach differs from other GI organs in that it has three layers of muscle instead of two. Under these muscle layers is the adventitia, layers of connective tissue continuous with the omenta. The epithelium of the stomach forms deep pits, called fundic or oxyntic glands. Different types of cells are at different locations down the pits. The cells at the base of these pits are chief cells, responsible for production of pepsinogen, an inactive precursor for pepsin, which degrades proteins. The secretion of pepsinogen prevents self-digestion of the stomach cells. Further up the pits, parietal cells produce gastric acid, which kills most of the bacteria in food, stimulates hunger, and activates pepsinogen into pepsin. Near the top of the pits, closest to the contents of the stomach, there are mucus producing cells called goblet cells that help protect the stomach from self-digestion. The muscularis externa, as previously mentioned, is made up of three layers of smooth muscle. The innermost layer is obliquely oriented, this is not seen in other parts of the digestive system, this layer is responsible for creating the motion that churns and physically breaks down the food. The next muscle layers are the circular and then the longituditinal, which are present as in other parts of the GI tract. The antrum has thicker muscle in its walls and performs more forceful contractions than the fundus. The pylorus is surrounded by a thick circular muscular wall which is normally tonically constricted forming a functional (if not anatomically discrete) pyloric sphincter, which controls the movement of chyme into the duodenum.

An assessment of what ive learned this semester in class Essay

An assessment of what ive learned this semester in class - Essay Example Still, the book is instrumental in making sure that I make correct choices for my personal life. In this article, I would like describe and share my experiences in college in the course of this spring semester in English 252B. Right from chapter one of the course book, we learnt the true definition of success. In this case, I discovered that success is a choice that a person makes. As such, the choices we make while in college have a direct impact on our success. According to the course book that I have mentioned above, success is defined as staying on course to your outcomes and experiences, creating wisdom, happiness, and unconditional self-worth along the way, (pg.3). Before I undertook the course, I defined success as a mare act of accomplishing set goals and targets. However, this changed once I read the book; the success is no longer the act of just passing exams, but the power of our choices that go hand and hand with accomplishing set goals and targets. By drawing illustration from the Downing work, we find that â€Å"The main ingredient in all success is wise choices. That’s because the quality of our lives is determined by the quality of the choices we make on a daily basis (3)†. T hese lines have been lingering in my mind and I have used them as my guide for nit only the entire semester, but also the rest of my course and entire life. Another discovery that I have made is that there exists two types of individuals; the victims and the creators. In chapter 2 Downing explains that the extent at which a person accepts personal responsibility determines if someone fits the description of a victim or a creator. To describe the creator dimension of a person, I would describe an example: in this case, when I have to choose between completing school work and taking a rest after a long day working, I would instead take a day off from work. That way I have taken the role of a creator as I

Community Hospital Database Assignment Example | Topics and Well Written Essays - 500 words

Community Hospital Database - Assignment Example Moreover, we have the physician table. This documents the details of the physician. On that note, it contains five fields, namely; the name of the physician, specialty, id of physician, date and the phone number. It is worth noting that decisive details’ pertaining to the fields is shown below. Furthermore, we also have the room utilization table. Apparently, this is mandated with the task of storing information regarding the accommodation of patients in the hospital. It contains four fields, which are the patient #, location, accommodation and the date discharged. It’s worth noting that the data pertaining to the type, fields’ size among others are shown below. Apparently, it is evident that the use of technology is essential in the smooth running of the Mountain View community hospital. Notably, it was critical for the incorporation of the database system in order to aid in various processes, for instance, the capturing and storage of the patient information among other important information required in a hospital setting(Demetriades Dinos 34). In actual fact, this was reached after a study was conducted in the hospital to establish some of the ways in which services can be improved in this hospital. First and foremost, in order for the above database system to be able to capture certain information, for instance, the marital status, gender, occupation, salary or the insurance coverage, the appropriate field must be added to the room utilization table and form(Demetriades Dinos 56). However, it is worth noting that the type data in each field should be specified accordingly to avoid errors that might arise.  

Marijuana Legalization Essay Example for Free

Marijuana Legalization Essay Marijuana legalization is a unique issue currently gaining momentum in America. Over 25 million Americans have used marijuana in the past year, 100 million have tried the drug at least once, and 14 million use regularly (â€Å"About Marijuana†). The growth, sale, possession, and consumption of marijuana for any reason are against federal law. Two states, Colorado and Washington, have legalized recreational marijuana use for adults over the age of 21, and sixteen additional states and Washington D. C. have legalized medical marijuana (â€Å"Pot Legalization Could Save†). However, all of these states are acting illegally according to federal law. Marijuana legalization is a complex issue that could upend cultural tradition, affect the economy, potentially affect crime and individual health, and challenge the balance of state and federal powers. The government’s purpose as stated in the Preamble of the Constitution is â€Å"to form a more perfect Union, establish justice, ensure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty†¦Ã¢â‚¬ . The constitutionality of marijuana criminalization thus depends on its effectiveness in promoting these goals. Three central areas to consider in the debate for or against legalization are the medical risks, the social effects, and the economic effects. The medical effects of marijuana have been fairly well studied. It is important to compare the medical risks of marijuana use versus use of drugs that are commonly and legally used and abused, such as tobacco and alcohol, as well as to distinguish between use and abuse. Smoking marijuana is widely presumed to have adverse effects on lung health. Smoking marijuana leads to the inhalation of up to three times as much tar as smoking cigarettes, probably because marijuana users inhale differently, breathing more deeply and waiting longer to exhale. Marijuana smoke can also contain up to 70 percent more carcinogens than tobacco smoke (Dohney). However, few marijuana users smoke as frequently as tobacco users. A study that was published in the Journal of the American Medical Association looked at marijuana smokers who averaged one joint per day for seven years and found no adverse effects on lung function (Dohney). In another study, called the CARDIA study (Coronary Artery Risk Developments in Young Adults), occasional and moderate marijuana users actually had increased lung capacity over tobacco smokers and non-smokers. For those who smoked marijuana 20 or more times per month, lung capacity dipped back to normal non-smoking levels, but only the most chronic marijuana smokers experienced lung capacity below an average non-smoker (Szalavitz, â€Å"Lung Damage†). Studies have thus far failed to link marijuana smoking and lung cancer. Although marijuana smoke is carcinogenic, THC (the active drug in the marijuana plant) also has anti-inflammatory and tumor-inhibiting properties, decreasing the risk of lung disease (Szalavitz, â€Å"Lung Damage†). Based on these conclusions, marijuana use is much less dangerous than tobacco use from a pulmonary standpoint. Additionally, many marijuana users ingest THC by inhaling vapor, eating it in baked goods, drinking it after simmering, or by swallowing concentrated capsules. These methods are increasing in popularity and don’t cause the same exposure to carcinogenic smoke (Dohney). Reduction in brain function is another commonly cited negative health effect of marijuana use. Judgment, coordination, attentiveness, reaction time, perception, and other mental functions can be altered while under the influence of marijuana. The assumption of such a statement is often that performing activities such as driving while high on marijuana is dangerous, but that assumption has not been emphatically confirmed in the consistent and extensive array of studies on drugged driving. Marijuana users are typically aware of slowed reaction time and impaired coordination, and they compensate by driving more cautiously (â€Å"Marijuana and Driving†). In one study, researchers compared driving under the influence of marijuana with driving under the influence of alcohol. They concluded, â€Å"Subjects who have received alcohol tend to drive in a more risky manner. Both substances impair performance; however, the more cautious behavior of subjects who have received marijuana decreases the impact of the drug on performance, whereas the opposite holds true for alcohol† (A.  Smiley). Of course, no one is advocating for impaired driving of any kind, be it under the influence of alcohol, marijuana, over the counter or prescription medication, or even fatigue. It is important to note, however, that driving high is less dangerous than driving under the influence of alcohol or some other drugs (Marijuana and Driving). Long-term concerns about impaired brain function from marijuana use are unfounded. Impairment of memory and learning ability don’t appear to extend beyond the time of the high itself. The popular image of young people ‘smoking themselves stupid’ has perpetuated an assumption that marijuana use is to blame for decreased intelligence. In a comprehensive study by the Centre for Mental Health Research at Australian National University, however, researchers concluded that apparent differences in intelligence among non-users, former users, light users, and heavy users were actually linked to participants sex, socio-economic backgrounds, and levels of education rather than to marijuana use itself. When these factors were considered, the effect disappeared and even heavy marijuana users did not show cognitive decline (Szalavitz, â€Å"Cognitive Impairment†). It is harder to determine the effect of marijuana on adolescents with developing brains. Legalization laws apply to adults over the age of 21, however, rendering that concern irrelevant. It is also notable that marijuana overdose can not cause death, while alcohol poisoning is responsible for numerous deaths every year (â€Å"About Marijuana†). Overall, the negative health effects (if any) of responsible, adult marijuana use are consistently found to be far less significant than the negative effects of the legal drugs alcohol and tobacco. In no proven way does marijuana pose a significant public health hazard. Different countries and states have and enforce very different drug laws, but in many places possession or cultivation of small amounts of marijuana has been decriminalized. Certain Australian states, Canada, some European countries, including the Netherlands, Germany, Switzerland, Spain, and Belgium, and several Latin American countries, including Peru, Argentina, Mexico, Chile, and Paraguay, are key examples of countries where personal use is legally acceptable (â€Å"World Marijuana Laws†). Many critics of marijuana legalization cite increased crime rates, increased use of marijuana and other drugs, and increased underage usage as potential issues. Exploration of the effects of legalization in other countries, as well as recently in Colorado and Washington, can show that these concerns are largely unfounded. Studies consistently find that decriminalization does not lead to increased usage of marijuana or other drugs (â€Å"Marijuana Decriminalization†). A study in the Journal for Public Health Policy, for example, stated: The available data indicate that decriminalization measures substantially reduced enforcement costs, yet had little or no impact on rates of use in the United States. In the South Australian community, none of the studies have found an impact in cannabis use which is attributable to the introduction of the Cannabis Expiation Scheme [decriminalization] (E. Single). As far as underage usage is concerned, drug dealers will of course never be bothered by the age of their clients. Legalization would be the only way for underage usage to be controlled, as licensed dealers would not be able to sell to those under 21 (â€Å"Legalization Will Reduce Crime†). No one has successfully linked marijuana use to increased violence, reckless behavior, or injury (E. Single). Alcohol abuse, however, is widely linked to violent crime, with an estimated 32 to 50 percent of homicides preceded by alcohol consumption (Gywenne). One of the only dangers associated with marijuana is a direct result of its illegality: innocents that stumble upon illicit farms or stashes are sometimes killed by farmers or traffickers to protect themselves from exposure (Quinones). These deaths, as well as deaths and injury due to fighting between traffickers, dealers, and clients, could be avoided by government regulated growth and sale of marijuana. Illicit drug producers and cartels seek one thing: profit. Because of marijuana’s illegality, secrecy is a key component of their success. They are not afraid to use extreme, ruthless measures to accomplish that end, and the legalization of marijuana would result in the loss of their most widespread market (â€Å"About Marijuana). The potential economic effects of decriminalization of marijuana are huge. It would cut criminal justice spending enormously by decreasing costs associated with catching and processing users (Bradford). Again, there is no established link between marijuana legalization and increased use, as well as no connection between use and crime (â€Å"Marijuana Decriminalization†). Nearly 850,000 people were arrested on marijuana-related charges last year, and ninety percent were for possession only (â€Å"Legalization Will Reduce Crime†). Prosecution for marijuana possession and time spent incarcerated can have devastating effects on an individual, shattering opportunities and creating massive obstacles in nearly every area of life (Gywenne). Beyond saving monetary resources and protecting the future of individuals who use marijuana responsibly, legalization would save time and human resources for more significant crimes in an overwhelmed legal system. More than 300 economists have signed a petition showing their agreement with a report stating that, between savings in the law enforcement department and potential tax revenues, the U. S. could save $13. 7 billion dollars per year. Other economists cite much larger savings, up to $100 billion (â€Å"Pot Legalization Could Save†). Marijuana is the largest cash crop in twelve American states, and in the top five in thirty-nine states (â€Å"Legalization Will Reduce Crime†). Nationwide, the industry is valued at around thirty-six billion dollars annually (Bradford). A market that large has huge economic implications and power, could create a considerable number of jobs, and legalization could reduce the cost of marijuana and thus inject a significant amount of money previously used for marijuana into other areas of the economy. Marijuana use does have the potential to be harmful, just as alcohol has the potential to be harmful. However, most marijuana use is not harmful. Legalization should allow for responsible use by adults only. Underage usage, impaired driving, smoking marijuana in public non-smoking areas, and the abuse of marijuana should be defined and prosecuted accordingly. The distinction between marijuana use and abuse is critical. Legalization would allow for more effective control of marijuana abuse, while decreasing violence, conserving resources, avoiding the dangers of questionable quality and purity due to unreliable dealers and farmers, and allowing for responsible use. Use of marijuana and other drugs would not increase significantly, crime would not increase, and health is a minimal concern. The marijuana debate comes down to a question of constitutionality. Does criminalizing marijuana promote the goals stated in the preamble, or is it counterproductive? Criminalizing the drug does not â€Å"form a more perfect union†, but rather raises a conflict between state and federal governments and the American population. Does it â€Å"establish justice†? It instead takes resources away from more serious issues of social justice to prosecute individuals who wish to responsibly exercise a choice. The criminalization of marijuana certainly works against the effort to â€Å"ensure domestic tranquility† by encouraging an underground market whose ruthless perpetrators resort to violence to protect their profit. On a similar note, it can be said that criminalization does not â€Å"provide for the common defense† or â€Å"promote the general welfare† because it promotes violence and because marijuana use does not pose a significant threat to public health or safety. Finally, legalization would â€Å"ensure the blessings of liberty† by allowing adults to make their own informed decisions about the use of the drug. Looking at each aspect individually, it becomes more and more clear that recreational marijuana legalization would be beneficial and constitutional. Word Count: 1906

Mao Zedong :: Chinese China History

Mao Zedong Mao Zedong is one of the most controversial leaders of the twentieth century. He has been known both as a savior and a tyrant to the Chinese people. From his tactical success of the Long March to his embarrassing failure of the Great Leap Forward, Mao has greatly influenced the result of what China is today. Most of Mao's major successes have been in the CCP's rise to power, while Mao's failures have come at a time when the CCP was in power. Mao Zedong was born on December 26, 1893 is Shaoshan village in Hunan. He experienced a middle peasant upbringing with a very conservative father. Ironically Mao went to an old-fashioned school where he learned the traditional Chinese curriculum. At this time in his childhood, the whole country could foresee the fall of the previous dynasty. Mao studied to be a teacher at The First Provincial Normal School , in Ch'ansha, which influenced his future thinking and beliefs. Mao believed that the Chinese way of thinking needed reform, therefore focused on younger people and peasants to build his political career. Mao ruled one quarter of the worlds population for one quarter of a century, and the way in which he was brought up and studied influenced his future decisions greatly. Mao was known to be rebellious when he was younger, but his first real experience came in 1912 when he decided to go to Wuhan and serve in the revolutionary army. For five years Mao studied and received an education in academics, but also politics. When Mao graduated in 1918 he was a political writer with a notable following. Mao had studied Marxism and other socialist ideas and by 1919 considered himself to be a Marxist. For a couple of years Mao wrote on his beliefs and even began organizing groups to share their ideas. Mao had organized a group of Communists in Changsha and in 1921 he went to Shanghai to participate in the First National Party Congress of the Chinese Communist Party. By the 1930s Mao was at the center of the Communist party after its defeat in 1927 by Chiang and the KMT. Mao organized and developed plans of a peasant-based guerilla strategy. Based in the province of Jiangxi, otherwise known as the Jiangxi soviet, Mao ruled nine million people and the CCP was begin to be a reckoning force. The KMT seeing the CCP as a threat attacked the Jiangxi soviet.

Expansionism and Continuation of Past Us Expansionism

Between the years 1860 and 1877 a revolution was brought on in the United States due to constitutional and social developments. Significant constitutional developments such as secession in 1860 and the Civil Rights Act of 1866 play an important role in the road to revolution. Social developments play a smaller role in this revolution. Freed slaves are the root of social developments such as the Black Codes, the Freedman’s Bureau, and the Ku Klux Klan. Politics and states’ rights, black suffrage, and civil rights issues all combine to create a revolution. However, while certain constitutional developments during this time period have proven to be revolutionary, the social developments of this era have proven to be exactly the opposite. Document A shows the first colossal step of secession, that being the South Carolina Declaration of Causes of Secession. In 1860, South Carolina is the first state that secedes from the Union. This is a vital constitutional development because after South Carolina secedes, other states begin to follow and secede from the Union as well. Document A discusses delegated powers and how powers not delegated to the US government are reserved for the people to handle, which is what the South strongly believes in. The Northern Unionists, on the other hand, believes to strengthen the federal government, which is shown in Document B. Senator John Sherman, a Northerner, describes states’ rights as a lack of nationality and how it is the reason the United States government is being overthrown. Unionists claim that the strong principles of states’ rights ruin the Union and will lead to financial and political ruin in the future. Sherman is advocating the restoration of the National Bank by saying that Americans should depend on the United States for currency and trade. Northern Unionists want a stronger central government and after the Civil War they get what they want. The end result of the Civil War is that the central government has the most power it has ever had up to this point in history. While the social developments during this era are not necessarily revolutionary, these developments have helped shape America to what it is today. Black suffrage is an important social development that helps change American society. Document D represents the different opinions of moderate and radical republicans on the issue of slavery. Moderate republican, Gideon Welles argues that slavery should be set aside instead of abolished. An important request that Blacks have after they are freed is that they should be given the right to vote. Document C is a petition from African American citizens to the Union convention of Tennessee, in this petition former slaves are sternly stating that they helped fight for the Union army and therefore, they deserve the right to vote. If former rebellious Southerners are allowed to vote, then African Americans should be given the right to vote as well. Document C especially shows that Blacks don’t have any rights during Johnson’s Reconstruction era. White supremacists, or the Ku Klux Klan, believe strongly that African Americans should not vote and they will go to radical extremes to prevent them from voting. Document I symbolizes the cruelty of the Ku Klux Klan by showing two white supremacists shaking hands over a crest with two Black people cringing in pain. This image not only represents the cruelty of the KKK, but also how social developments are not revolutionary. When the Northern military left the South, this allowed for the Redeemer governments to rise to power. These Redeemer governments were catastrophic and only proved that the New South was, in fact, worse than the former South before secession. Since this New South is found to be atrocious, in no way is it revolutionary. Other social developments, such as the Freedmen’s Bureau, play a small part in the change of American society, which is technically a small revolution in itself. The Freedmen’s Bureau is designed to help Blacks and poor whites with food, shelter, and education (Document E). However, as stated in Document E, the Freedmen’s Bureau was going to give Homesteads to the freed slaves, but the government kept none of its promises. Freed African Americans demand the right for land and they find it unfair that once again Southerners, former traitors to the Union, are handed land when they do not rightly deserve it. Rather the African Americans deserve the land because they were loyal to the Union in the Union’s time of need. African Americans are speaking out more, which is a positive development because these demands are what eventually will get them their rights. Senator Lot Morrill describes the Civil Rights Act of 1866 as absolutely revolutionary (Document F). Senator Lot Morrill, a Unionist, is responsible for the Morrill Tariff Act. This act is designed to raise tariffs to provide land to states for education. The Civil Rights Act of 1866 is not only an important constitutional development, but also a social development. The 13th, 14th, and 15th amendments are all beneficial constitutional developments because hese amendments show that the federal government has more power than state governments. The Civil Rights Act considers African Americans as citizens. From the time of South Carolina’s seceding in 1860 to the final withdrawal of Union troops from the South in 1877, the nation of America was filled with revolutions. There was constant development in this time both socially and constitutionally. It was a result of these developments that the Revolutions of the Civil War, Reconstruction, and the Redeemers would take place.

Control Variable - Definition in Sociology

A control variable is a variable that is held constant in a research analysis. The use of control variables is generally done to answer four basic kinds of questions: Is an observed relationship between two variables just a statistical accident?If one variable has a causal effect on another, is this effect a direct one or is it indirect with another variable intervening?If several variables all have causal effects on the dependent variable, how does the strength of those effects vary?Does a particular relationship between two variables look the same under various conditions?