Cardiac Action Potential Essay Example

Cardiac Action Potential Essay You scored 100% by answering 4 out of 4 questions correctly. 1. The cardiac muscle is capable of which of the following? You correctly answered: c. autorhythmicity 2. Phase 2 of the cardiac action potential, when the calcium channels remain open and potassium channels are closed, is called the You correctly answered: a. plateau phase. 3. Which of the following is true of the cardiac action potential?You correctly answered: b. The cardiac action potential is longer than the skeletal muscle action potential. 4. The main anatomical difference between the frog heart and the human heart is that the frog heart has You correctly answered: c. a single, fused ventricle. 08/25/13 page 1 Experiment Results Predict Question: Predict Question 1: When you increase the frequency of the stimulation, what do you think will happen to the amplitude (height) of the ventricular systole wave? Your answer : b. The amplitude will decrease.Predict Question 2: If you deliver multiple stimuli (20 stimuli per s econd) to the heart, what do you think will happen? Your answer : b. tetanus Stop Think Questions: 1. Watch the contractile activity from the frog heart on the oscilloscope. Enter the number of ventricular contractions per minute (from the heart rate display) in the field below and then click Submit to record your answer in the lab report. You answered: 60 beats/min Which of the following statements about the contractile activity is true? You correctly answered: a. The smaller waves represent the contraction of the atria.During which portion of the cardiac muscle contraction is it possible to induce an extrasystole? You correctly answered: d. during relaxation Experiment Data: 08/25/13 page 2 08/25/13 page 3 Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The amplitude of the ventricular systole did not change with the more frequent stimulation because You correctly answered: a. a new contraction could not begin until the relaxation phase 2. Wh ich of the following do you think contribute to the inability of cardiac muscle to be tetanized?You correctly answered: a. the long refractory period of the cardiac action potential 3. Given the function of the heart, why is it important that cardiac muscle cannot reach tetanus? You correctly answered: b. The ventricles must contract and relax fully with each beat to pump blood. 4. An extrasystole corresponds to You correctly answered: c. an extra ventricular contraction. 08/25/13 page 4 Review Sheet Results 1. Explain why the larger waves seen on the oscilloscope represent the ventricular contraction.Your answer: The ventricles are larger domiciliate which is why, when they contract they create more force thus making a bigger wave. 2. Explain why the amplitude of the wave did not change when you increased the frequency of the stimulation. (Hint: relate your response to the refractory period of the cardiac action potential. ) How well did the results compare with your prediction? Yo ur answer: The maximum threshold will not change in cardiac muscle cells (as with any other cells), which is determined by the X amount of voltage needed for calcium channels to open.After this point, no additional voltage can cause the channels to open more, or again, prior to depolarization. 3. Why is it only possible to induce an extrasystole during relaxation? Your answer: cardiac is able to depolarize only after repolarization. 4. Explain why wave summation and tetanus are not possible in cardiac muscle tissue. How well did the results compare with your prediction? Your answer: Cardiac cells have long action potentials and long twitches, therefore do not show temporal summation. 08/25/13 page 5

What Is Dynamic Equilibrium Definition and Examples

What Is Dynamic Equilibrium Definition and Examples SAT / ACT Prep Online Guides and Tips Dynamic equilibrium is an important concept in chemistry. But what is dynamic equilibrium exactly? How can something be dynamic but also at equilibrium? Keep reading to learn the best dynamic equilibrium definition, common dynamic equilibrium examples, and how dynamic and static equilibrium may look the same but are in fact very different. What Is Dynamic Equilibrium? Chemical reactions can either go in both directions (forward and reverse) or only in one direction. The ones that go in two directions are known as reversible reactions, and you can identify them by the arrows going in two directions, like the example below. H2O(l) â‡Å' H+(aq) + OH-(aq) Dynamic equilibrium only occurs in reversible reactions, and it’s when the rate of the forward reaction is equal to the rate of the reverse reaction. These equations are dynamic because the forward and reverse reactions are still occurring, but the two rates are equal and unchanging, so they’re also at equilibrium. Dynamic equilibrium is an example of a system in a steady state. This means the variables in the equation are unchanging over time (since the rates of reaction are equal). If you look at a reaction in dynamic equilibrium, it’ll look like nothing is happening since the concentrations of each substance stay constant. However, reactions are actually continuously occurring. Dynamic equilibrium doesn't just occur in chemistry labs though; you've witnessed an dynamic equilibrium example every time you've had a soda. In a sealed bottle of soda, carbon dioxide is present in both the liquid/aqueous phase and the gaseous phase (bubbles). The two phases of carbon dioxide are in dynamic equilibrium inside the sealed soda bottle since the gaseous carbon dioxide is dissolving into the liquid form at the same rate that the liquid form of carbon dioxide is being converted back to its gaseous form. The equation looks like this: CO2(g) â‡Å' CO2(aq). Changing the temperature, pressure, or concentration of a reaction can shift the equilibrium of an equation and knock it out of dynamic equilibrium. This is why, if you open a soda can and leave it out for a long time, eventually it'll become "flat" and there will be no more bubbles. This is because the soda can is no longer a closed system and the carbon dioxide can interact with the atmosphere. This moves it out of dynamic equilibrium and releases the gaseous form of carbon dioxide until there are no more bubbles. Dynamic Equilibrium Examples Any reaction will be in dynamic equilibrium if it’s reversible and the rates of the forward and reverse reactions are equal. For example, say that you prepare a solution that is saturated with an aqueous solution of NaCl. If you then add solid crystals of NaCl, the NaCl will be simultaneously dissolving and recrystallizing within the solution. The reaction, NaCl(s) â‡Å' Na+(aq) + Cl-(aq), will be in dynamic equilibrium when the rate of the dissolution of the NaCl equals the rate of recrystallization. Another example of dynamic equilibrium isNO2(g) + CO(g) â‡Å' NO(g) + CO2(g) (again, as long as the two rates are equal). Nitrogen dioxide (NO2) reacts with carbon monoxide (CO) to form nitrogen oxide (NO) and carbon dioxide (CO2), and, in the reverse reaction, nitrogen oxide and carbon dioxide react to form nitrogen dioxide and carbon monoxide. If you’re observing a reaction, you can tell it’s not at dynamic equilibrium if you can see changes occurring in the amounts of reactants or products. (If you can’t see any changes, that doesn’t guarantee it’s at dynamic equilibrium, since it may be at static equilibrium or the changes may be too small to see with the naked eye.) An example of an equation that could never be at dynamic equilibrium is: 4 Fe(s) + 6 H2O(l) + 3O2(g) → 4 Fe(OH)3(s). This is an equation for the formation of rust. We can see that it’ll never be in dynamic equilibrium because the arrow for the reaction only goes one way (which is why a rusty car won’t become shiny again on its own). There's no dynamic equilibrium for this car! Dynamic Equilibrium vs Static Equilibrium If you observe reactions at dynamic equilibrium and reactions at static equilibrium, neither will have visible changes occurring, and it'll look like nothing is happening. However, reactions at static equilibrium are actually very different from those at dynamic equilibrium. Static equilibrium (also known as mechanical equilibrium) is when the reaction has stopped and there is no movement at all between the reactants and products. The reaction is complete and the forward and reverse reaction rates are both 0. While reactions at dynamic equilibrium are reversible (can proceed in either direction), those at static equilibrium are irreversible and can only proceed in one direction.However, both dynamic equilibrium and static equilibrium are examples of systems at steady state, in which the net force action on the systems is zero. Below is a chart showing the key differences between dynamic and static equilibrium. Dynamic Equilibrium Static Equilibrium Reversible Irreversible Reaction is still occurring Reaction has stopped Rate of forward reaction = rate of reverse reaction Both reaction rates are zero Occurs in a closed system Can occur in an open or closed system How Does Dynamic Equilibrium Relate to Rate Constants? When a reaction is at dynamic equilibrium, the reaction will have a specific rate constant, known as the equilibrium constant, or Keq. The equilibrium constant, or rate constant, is a coefficient that shows the reaction quotient (or the relative amounts of products and reactants in the reaction at a given point in time) when the reaction is at equilibrium. The value of the equilibrium constant will tell you the relative amounts of product and reactant at equilibrium. If Keqis 1000, at equilibrium there will be mostly product. If Keqis between .001 and 1000, at equilibrium there will be a significant amount of both product and reactant. If Keqis .001, at equilibrium there will be mostly reactant. For the reactionaA + bBâ‡Å'cC+dD, A and B represent the reactants and C and D represent the products. The equation for the equilibrium constant is Keq=[C]c[D]d/[A]a[B]b. Example Take the reaction N2(g)+O2(g)⇋2NO(g). Using the equation for the equilibrium constant, Keqis equal to [NO]2/[N2][O2]. You would either leave the equation like this, or, if you're given equilibrium concentrations/the equilibrium constant, you can plug those in to find any missing values. Say we know the concentrations of both[N2] and [O2]=.15 M and the concentration of [NO] is 1.1 M. Plugging in those values would give you: Keq= (1.1)2/(.15)(.15) or 1.21/.0225. You can solve and find that Keq=53.8. SinceKeqis between .001 and 1000, there will be a significant amount each of NO, O2, and N2at equilibrium. Summary: What Is Dynamic Equilibrium? What is the best dynamic equilibrium definition? Dynamic equilibrium occurs when, for a reversible reaction, the rate of the forward reaction equals the rate of the reverse reaction.Since the two rates are equal, it looks like nothing is happening, but in reality the reaction is continuously occurring at its stable rate. In contrast, reactions at stable equilibrium are complete and no further reaction is occurring. The equation for the equilibrium constant isKeq=[C]c[D]d/[A]a[B]b. What's Next? Writing a research paper for school but not sure what to write about?Our guide to research paper topicshas over 100 topics in ten categories so you can be sure to find the perfect topic for you. Want to know the fastest and easiest ways to convert between Fahrenheit and Celsius?We've got you covered!Check out our guide to the best ways to convert Celsius to Fahrenheit(or vice versa). Are you studying clouds in your science class?Get help identifying thedifferent types of cloudswith our expert guide.

Linguistics Essay Example | Topics and Well Written Essays - 500 words - 1

Linguistics - Essay Example Linguistic and Literary Issues 2: The discourse inference process in literary texts, such as Dickinson's "Abraham to Kill Him," brings about an "interaction between the semantic meanings of the linguistic items of the text and the pragmatic meanings these items take on in a context of use." (Verdonk, 22) Linguistic and Literary Issues 3: Unlike in the non-literary texts, the relationship between meaning and context in literary text "is self-enclosed" and the text itself contains the connection between meaning and context Dickinson's "Abraham to Kill Him." Linguistic and Literary Issues 4: The ultimate meaning of the poem "Abraham to Kill Him" is revealed in an analysis of the relation between meaning and context of the poem and in the context of Dickinson's rebelliousness, the lyric achieves a distinct meaning to the traditional biblical interpretations where "she finds traces of a Father God she would unmask." (McIntosh, 82) The significance of context to the meaning of a literary piece is immense or meaning is context-bound. Unlike in the non-literary texts, the context-meaning relationship in a literary text is self-enclosed and the meaning is revealed through an interpretation of the literary context of the text itself.

The Battles of Gettysburg and Vicksburg Essay Example | Topics and Well Written Essays - 1500 words

The Battles of Gettysburg and Vicksburg - Essay Example In fact, some scholars would estimate that without the Civil War the United States might never have become the country that it became. More so, if it were not for two definitive battles of the Civil War, the Battles of Vicksburg and Gettysburg, then the United States we built would be very different from the one we have today; if we survived at all as a nation. That said understanding the importance of these battles will help us to comprehend why these battles are so significant and if they were such definitive â€Å"turning points† in the war, then why did the war continue on, nearly, another 2 years? By finding the answers to these questions will grant us a greater, broader, picture of how the United States became the country we are today. History . The definitive battles of Vicksburg and Gettysburg did not occur until 1863, the Civil War began 2 years earlier. The causes of the Civil War can be summarized in 5 specific contributory elements. In fact, these tensions had been growing since the founding of this country in 1776. 1. The Economic & Social Differences between North and South. By the late 1700s cotton crops were incredibly valuable and profitable. The South developed an agricultural, one crop economy. They were exclusively dependent on the success and sail of their cotton crops and on the inexpensive slave labor that tended them. The North was focused on city life and industrialization. They could already compete with the South’s ability to clean, process, and manufacturer cotton goods. 2. State vs. Federal Rights. Many in America pushed for the supremacy of state’s individual rights and that they should have the right to determine what federal involvement they would accept. While others pushed for greater federal government to unify and force the hand of states. 3. Slave and Non-Slave State Proponents. The argument over whether new states formed would be slave states, free states, or would have the right to choose for themselve s was a heated one. This created serious division between supporters and opposers of slavery in the United States. 4. Growth of the Abolition Movement. The Abolitionist movement, further inspired by the publishing of â€Å"Uncle Tom’s Cabin† and the passing of the Fugitive Slave Act, fueled Northern disdain and hatred for Southern slave-owners. 5. The Election of Abraham Lincoln. Although tensions were already high, Lincoln’s election inspired South Carolina to submit its intention to secede from the United States because Lincoln favored northern interests, and was opposed to slavery. Even before Lincoln took the office, Florida, Mississippi, Texas, Louisiana, and Georgia, also, intended to join South Carolina (Kelly 2013). By 1861 Fort Sumter, in South Carolina’s Charleston Harbor, contained the last federal holding within the Southern seceding states. Cut off from supplies and reinforcements, the men of Fort Sumter were suffering. On April 11, 1863 Conf ederate soldiers led by Jefferson C, Davis, no relation to the Confederate President, ordered the evacuation of Fort Sumter, delivered personally to Union Major Robert Anderson. Although Anderson thanked the envoy for the courteous and respectfully presented request, he declined to obey the order. As the Confederate envoy left the Fort, it would be only a few short hours before, at 4:30 in the morning; the first battle of Civil War would be fought. Confederate General Pierre Gustavo Beauregard ordered his men to open fire

Limited Liability Corporation and Limited Liability Partnership Paper Essay

Limited Liability Corporation and Limited Liability Partnership Paper - Essay Example But, LLPs still impose certain obligations from each of the partner as a way of maintaining standards of accountability. LLPs differ from other general partnerships in one particular aspect, namely, that each partner is only liable to his/her own debts and obligations and are not required to share the burden of their partners’ debts and obligations. In the United States, there are comprehensive legislations that govern the conception and formation of LLPs. This form of partnership is more suitable to companies offering professional services such as law firms, an accountancy firms, etc. As a matter of fact, a few states within the United States allow only certain professional classes to form LLPs. The primary legislative document that deals with partnership firms is the Uniform Partnership Act, which provides detailed guidelines. Further, many states offer liability protection only against select negligence claims, which implies that for, say, contract claims, a partner can be made liable. LLPs are similar to other partnership arrangements in that the profits accrued are divided evenly among all the members of the partnership. This is essentially to facilitate taxation and to avoid double taxation, which can dent an individual member’s profits. Some state legislation adds more conditions for limited liability. For example, â€Å"Many states provide protection only against tort claims and do not extend protection to a partners own negligence or incompetence or to the partners involvement in supervising wrongful conduct. Other states provide broad protection, including protection against contractual claims brought by the partnerships creditors. It further provided, however, that a partner was personally liable to the partnership and copartners for any breach of duty, and also allowed a creditor or other claimant to pierce the limited liability shield of a partner in

Advantages of Cooperative Learning for English Language Learners

Advantages of Cooperative Learning for English Language Learners Cooperative learning is a successful teaching strategy in which small teams, each with students of different levels of ability, participate in a variety of learning activities to improve their understanding of a subject (Noyes, 2010). Each member of a team is accountable not only for learning what is taught but also for helping teammates learn, thus creating an environment of success (Kagan, 2002). Students work through the task or assignment until all group members successfully understand and complete it. For English language learners, cooperative learning is critical, because it truly accelerates learning. There is no better way to learn language, other than using it. Teachers often model language but, hamper students by not providing them with opportunities to apply it and master aspects of the language as rapidly as possible (Noyes, 2010). Cooperative learning provides the opportunity for English language learners (ELL) to accelerate learning of the language skills required to be doing well in academic subjects. The purpose of cooperative learning is each member of the team is accountable for not only learning what is taught, but also helping their teammates learn. It creates an atmosphere of community and achievement (Kagan, 2002). The students are actually teaching each other and a function thats community based and builds collaboration. Cooperative learning is a strategy that can be used with all students. Benefits for English Language Learners Cooperative learning is usually valuable for any student learning a second language. Cooperative learning activities support peer communication, which helps the expansion of language and the learning of concepts and content (Kagan, 2002). It is essential to assign ELLs to different teams so that they can benefit from English language role models. ELLs learn to convey themselves with greater independence when working in small teams. In addition to picking up vocabulary, ELLs benefit from observing how their peers learn and explain problems. Roles need to be assigned and rotated each week or by activity. By rotating, students increase skills they mainly need to perform. Cooperative learning builds learning communities as students grow to be experienced at how to get along, how to be concerned for themselves and for each other and how to deal with their own performance as they work on the way to a common objective (Kagan, 2002). Cooperative learning groups make best use of the swift attainment of English because it provides students with understandable contribution in English in encouraging, non-threatening surroundings (Noyes, 2010). Academic and language learning requires that students have opportunities to figure out what they hear and read as well as express themselves in significant tasks (McGroarty, 1993). Cooperative learning creates normal, interactive contexts in which students have bona fide reasons for listening to one another, asking questions, expounding issues, and re-stating points of observation. The foundation of school achievement is academic literacy in English; age appropriate comprehension of English is a requirement in the accomplishment of content standards. We learn mainly through language and use of language to convey our knowledge. Cooperative learning increases opportunities for students to construct and figure out language and to gain modeling and criticism from their peers. A great deal of the significance of cooperative learning lies in the way collaboration encourages students to connect in such high level thinking skills as analyzing, explaining, synthesizing, and elaborating (McGroarty, 1993). Teachers Role in Cooperative Learning Standards must be taught. The rules of learning groups must be understood by all students (Noyes, 2010). The learning groups must be free from negative comments which hinder learning and growth. Everyone must be active listeners; each team member must participate, and help everyone understand the objective and what is being learned. Additionally, noise levels must be kept in perspective and the group needs to keep on the assignment. Schools must provide teaching that assists ELLs in acquiring content area comprehension along with resources for becoming skilled in English (NCLB, 2001). Cooperative learning is not just group work (Noyes, 2010). For it to be effective, the teacher must teach high utility words that appear within the content areas that are a means to comprehension along with definitions and examples of use in context. The group must engage each member in learning words through an assortment of methods of comparing, analyzing, and using target words because academic language is important for reading and mastery of skills in all subject areas. Careful planning is a must for cooperative learning to be effective. ELLs working in cooperative learning groups must be given assignments according to their levels of English proficiency. The teacher must be aware of their stages of language acquisition. Class building and team building activities such as mix pair share, mingle and match, give one/get one, find someone who, think pair share, round table, and roam the room are useful ways to integrate cooperative learning into the classroom (Noyes, 2010). Conclusions Research suggests that cooperative learning techniques boost ability for all students (Noyes, 2010). Cummins (2001) considers cooperative learning an empowerment pedagogy because students have greater opportunities to practice oral language. Cooperative learning is a successful approach in which small teams, each with students of diverse levels of capability, use a range of learning activities to advance their understanding of a topic (Noyes, 2010). Each member of the team is accountable not only for learning what is taught, but also for helping teammates learn through the formation of an environment of accomplishment (Kagan, 2002). Cooperative efforts result in members motivated for mutual achievement so that all gain from each others efforts, recognize that all members share a common fate, know that ones performance is caused by each other working together and feel proud and jointly celebrate when one is recognized for success. Cooperative learning is not just group work or a way to keep students busy. Teachers must provide key instruction in phonemic awareness, phonics, fluency, vocabulary, and comprehension and allow the dynamics of cooperative learning to provide practice for proficiency.

Concepts Of Lifetime Fitness :: essays research papers

Concepts of Lifetime Fitness Homeostasis is the state of equilibrium in which the internal environment of the human body remains relatively constant.   Two excellent examples of homeostasis are how the body maintains a constant temperature and blood pressure during strenuous physical activity or exercise.   Although there are many other activities in the body that display homeostasis, I will only discuss these two.    Temperature in the human body is usually kept at approximately 37 degrees Celsius.   To maintain such a strict temperature, the body has a few functions to combat the outside elements.   People cannot make themselves cold as readily as make themselves hot, however I will mention both homeostasis functions.   When the external temperature decreases, a portion of the brain called the hypothalamus detects the drop by means of the blood.   To compensate, the brain sends chemical and electrical impulses to the muscles.   These impulses tell the muscles to begin to contract and relax at very high intervals.   This is commonly known as shivering.   The production of Adenosine Triphosphate or ATP in the mitochondria of the muscles produces heat.   If the body temperature does not rise immediately after this, then a second function begins. The brain will signal the blood vessels near the skin to constrict or narrow in diameter.   This occurs so the heat deep in the muscles is conserved.   Since the vessels are now smaller in diameter, less blood is needed to fill them.   Since less blood is needed through the vessels, the heart begins to slow.   If the body remains in this slowed state, hypothermia could result.   Hypothermia is the condition in which metabolic processes are inhibited.   The medical world has taken advantage of this by inducing hypothermia in patients that are undergoing organ transplants. To fight temperatures higher than normal, as in exercise or on hot days, the body reacts in the opposite way than with cold.   Again, the hypothalamus detects the change of temperature in the blood.   The brain signals blood vessels not to constrict, but to dilate.   This increases the diameter of the vessels, and results in the need for more blood. Since more blood is needed to fill the vessels, the heart pumps faster and that causes respiration to increase.   The increased respiration will make the body exhale some of the internal heat, like placing a fan in a window to cool a room.   The blood vessels are dilated so the heat deep in the muscles is easily released.   Another commonly known mechanism to fight heat is sweating.   Sweat glands found throughout the body are stimulated by the hypothalamus to excrete sweat and when the sweat evaporates,

Manifest destiny: was it really imperialism? Essay

Imperialism is, by definition, the extension of rule or influence by one government, nation or society over another; manifest destiny is the belief held by many Americans in the 1840s that the United States was â€Å"destined† to expand across the continent. This belief of â€Å"destined expansion† was nothing new to America’s leaders for their vision of the United States when they first established it was that of a nation that stretched from the Atlantic to the Pacific. The American people themselves had underlying reasons for their imperialistic actions as well, mostly economic and political. During the conquest of manifest destiny the US acquired Texas, Oregon and California. Americans tooled over the West like an aggressive imperialistic empire reaching over unclaimed lands full of Native Americans and Mexicans in order to accomplish their political and economic destiny. Stimulated by the American Revolution, Americans felt the need to expand its territories. In February of 1821, Congress ratified the Transcontinental Treaty, which completely excluded Texas from American territory. American’s feelings towards Texas quickly changed when they realized that cotton flourished on the Texas plains. The South quickly took interest in the land. Mexican authorities even offered free land to groups of settlers following the treaty and by 1830 there were 20,000 white Americans and 2,000 slaves living in Texas. In 1836 Texas declared their independence from Mexico and ten years later was annexed into the US. The annexation of Texas had been a controversy for years because of the slavery issue. Slavery was another issue that further fueled expansionism, as the North and South each wanted the nation to admit new states that supported its section’s economic, political, and slave policies. The United States had no reason to annex Texas other than the fact that they wanted the fertile land and more votes in Congress. They hid behind the idea of â€Å"Manifest Destiny† but the truth is that each section wanted the land for its own purposes. We even fought a war of it. The unnecessary annexation of Texas is a perfect example of imperialism in the United States. The expansion campaign in America during the 19th century stretched all the way west to Oregon. Oregon was a territory that was shared with the British under the Treaty of 1818. Americans pressured the British to give up their  claim to Oregon territory. This allowed the Americans to fulfill their Manifest Destiny and own land all the way to the Pacific Ocean. Not many people lived in Oregon before but suddenly, in the early 1840’s, a huge caravan of people began to move to Oregon, spurred on by manifest destiny. The land in Oregon was fertile and the fur plentiful. This trip to Oregon became known as the Oregon Trail. These pioneers fought little wars with the Native Americans along the route, argueing over posession of land once they arrived. Many Americans took their land in Oregon by the way of the gun. They pointed their guns at everything that moved in order to get their land. This is imperialism, how the government gave permission to kill thousands without giving any recognition whatsoever to who was living there before, to who’s home that might have been. Another example of imperialism in the US can be seen by looking at the way we handled California. California was really the key to the Pacific and the trade routes with Asia and China. West Coast harbors such as San Diego, San Francisco and the Strait of Juan de Fuca were considered â€Å"the keys to the trade† and the Americans wanted them. A caravan of American pioneers embarked on the California trail and, as the Mexicans had expected, the settlers brought word back and the US now wanted to annex California. President Polk had sent an envoy to Mexico City in an attempt to purchase California and other parts of the Southwest. In May 1846 Mexico refused the offer. This refusal was one factor–along with the Texas annexation–that led to the Mexican War. This land was not ours, we had no right to fight a war over it. That is imperialism; the extending a nation’s power by territorial acquisition, by force at times. America ended up winning the Mexican War and acquiring Texas and California along with all the trade routes, and it was phenomenal for our economy but the end does not justify the means. To conclude Manifest destiny, the American policy of acquiring certain choice territories, can be labeled as nothing more than aggressive imperialism for that is what it is. We wanted land and we got it just because we did. We trampled over Native Americans and Mexicans just to establish trade routes and to gain political power. In the end we extended our borders by about 66%  through manifest destiny, the doctrine that was no more that an excuse for Americans to become aggressive imperialists.

Free Essays on Sony Ericsson

Sony Ericsson, a 50:50 joint venture of Sony Corporation and Ericsson AB, was established in October 2001. It stands by the mission â€Å"†¦to establish Sony Ericsson as the most attractive and innovative global brand in the mobile handset industry.† Sony Ericsson Mobile Communications (SEMC) is a global provider of mobile multimedia devices, including feature-rich phones and accessories, PC cards and M2M solutions. SEMC is a global provider of mobile multimedia devices, including feature-rich phones and accessories, PC cards and M2M solutions. The products combine powerful technology with innovative applications for mobile imaging, communications and entertainment. The net result is that Sony Ericsson is an enticing brand that creates compelling business opportunities for mobile operators and desirable, fun products for end users. Sony Ericsson Mobile Communications was established in 2001 by telecommunications leader Ericsson and consumer electronics powerhouse Sony Corporation. The company is owned equally by Ericsson and Sony and had announced its first joint products in March 2002. Product Portfolio Sony Ericsson products have universal appeal and are tangibly different in the key areas of imaging, design and applications. The company has consistently launched products that make best use of the major mobile communications technologies, such as the 2G and 3G platforms, while enhancing its offerings to entry-level markets. In early 2005, Sony Ericsson announced a large number of new phones, networking products and accessories that move the portfolio significantly forward and are anticipated to stimulate a new phase of growth for the company. Included were the stunning yet affordable K600 3G UMTS handset that brings the possibilities of the 3G network to a wider public; the K750, the company’s first 2 Megapixel, auto focus camera phone; and the W800 Walkman ® branded music phone that combines a ... Free Essays on Sony Ericsson Free Essays on Sony Ericsson Sony Ericsson, a 50:50 joint venture of Sony Corporation and Ericsson AB, was established in October 2001. It stands by the mission â€Å"†¦to establish Sony Ericsson as the most attractive and innovative global brand in the mobile handset industry.† Sony Ericsson Mobile Communications (SEMC) is a global provider of mobile multimedia devices, including feature-rich phones and accessories, PC cards and M2M solutions. SEMC is a global provider of mobile multimedia devices, including feature-rich phones and accessories, PC cards and M2M solutions. The products combine powerful technology with innovative applications for mobile imaging, communications and entertainment. The net result is that Sony Ericsson is an enticing brand that creates compelling business opportunities for mobile operators and desirable, fun products for end users. Sony Ericsson Mobile Communications was established in 2001 by telecommunications leader Ericsson and consumer electronics powerhouse Sony Corporation. The company is owned equally by Ericsson and Sony and had announced its first joint products in March 2002. Product Portfolio Sony Ericsson products have universal appeal and are tangibly different in the key areas of imaging, design and applications. The company has consistently launched products that make best use of the major mobile communications technologies, such as the 2G and 3G platforms, while enhancing its offerings to entry-level markets. In early 2005, Sony Ericsson announced a large number of new phones, networking products and accessories that move the portfolio significantly forward and are anticipated to stimulate a new phase of growth for the company. Included were the stunning yet affordable K600 3G UMTS handset that brings the possibilities of the 3G network to a wider public; the K750, the company’s first 2 Megapixel, auto focus camera phone; and the W800 Walkman ® branded music phone that combines a ...

Symbolism in Hedda Gabler essays

Symbolism in Hedda Gabler essays Novels and plays have many themes and sub - themes that play an important role in keeping the reader interested and entertained as well as creating a base for the plot. Injustice is a common theme or sub theme in literature. Injustice plays an important role in the Novel Hedda Gabler by Henrick Ibsen. In this novel injustice is used as a sub-theme to the major theme which is jealousy and anger with society. Henrick Ibsen used many symbolisms to show Heddas jealousy and anger. Most of these symbolisms were acts of injustice, for example, Hedda loves Mrs. Elvsteds hair, because it is long, and beautiful blonde hair, and throughout the novel, Hedda pulls Mrs. Elvsteds hair. However the pulling of hair goes deeper than being jealous of hair, Hedda envies Mrs. Elvsted because she is the type of person that Hedda is to scared to be. This form of injustice lets us see the kind of person Hedda is, and problems that she inhabits. From this action the reader doesnt know weather to dislike Hedda for being a jealous person or to feel sorry for her with the understanding of the kind of person she is. The climax of the novel which was the burning of Loveborgs manuscripts showed us the ultimate injustice that Hedda has committed that symbolizes uncontrollable anger and her inability of controlling her emotions. These actions of injustice that were committed by Hedda were sparked by Heddas inju stice towards her self. She could have been true to herself and married Loveborg, the man she truly loved instead she married Tesman who represented stability and who she despised. In conclusion, acts of injustice allow us to see deeper into the character that has committed them. Injustice is one of the common themes in literature because it can be used to describe many characters and highlight many more. ...

PTSD 2 Essay Example | Topics and Well Written Essays - 250 words

PTSD 2 - Essay Example tic criteria demands that the diagnosed symptoms last for more than a month and must cause a significant social or occupational impairment (Ursano, 2004). The causes of PTSD are believed to originate from experiences of any event that produce intense pessimistic feeling of helplessness, fear or horror to the victim. Some of the sources of such experiences may include: witnessing adult or childhood sexual or physical abuse, physical assault or sexual assault, occupations related to war and disaster, and being diagnosed with an illness that threatens life. PTSD may impact adversely on the victims. Some of its outcomes may include terror, fear, loss of memory among others (Acierno, 1999). Diagnosis criteria of PTSD as mentioned above demands that the diagnosed symptoms last for more than a month and must cause a significant social or occupational impairment. The diagnosis can be categorized into the following: exposure to a traumatic event involving risk of death or serious injury, loss of physical integrity and intense negative feeling of fear, helplessness or horror; persistent re-experiencing of the events resulting into flashback memories, subjective re-experiencing of the trauma, reappearance of distressing dreams, and intense negative physiological or psychological response to any subjective or objective reminder of the events; persistent emotional numbing and avoidance of stimuli that is associated with the traumatic event, inability to remember the main parts of the trauma, and avoidance of people or places that may bring back the distressing memories; persistent increase of arousal symptoms that were initially absent; symptoms lasting for more than one month ; and significant social or occupational impairment (Cahill, 2004). Prevention and intervention strategies of PTSD are needed in order to prevent the adverse effects of this condition to the victims. Experts have suggested cognitive behavioral therapy and critical incident stress management as

Romantic Relationship Case Study Example | Topics and Well Written Essays - 750 words

Romantic Relationship - Case Study Example After some distance, the train reached as certain destination along the way and some passengers were alighting including an old man who sat beside Pamela. Jerry knew that it was best for him to use the opportunity to move and occupy the space beside Pamela because he also felt attraction. As he headed to the seat, Pamela felt unease and turned her face way from Jerry. She knew that Jerry received her signals and was reacting. On occupying the space, Jerry greeted Pamela who responded positively. With slight smile, Jerry asked Pamela about her destination and both realized to be heading to the same destination. It is there that Jerry initiated talks that later developed until they exchanged contacts and would later meet to advance their intentions. Jerry and Pamela developed great passion and intimacy for one another, but were still living apart. Pamela could develop cold feelings and mood when it took long before meeting Jerry and vice versa. Both could express feelings of â€Å"missing one another† when a week lapsed without meeting and engaging in sexual intercourse. In fact, Pamela seemed so inclined into the relationship and cliqued to Jerry that they should begin living together. Both were students of different schools who rented apartments. Due to lack of commitment, Jerry refused the idea to live together for he knew that such relationship would demand a lot than he could offer. He suggested that they continue with their love as they took time to know one another deeply. By the end of four months, Pamela’s intimate feelings overwhelmed her and prompted Jerry about living together for she missed a lot about Jerry when they lived apart. Pamela expressed concern that she would quit the relationship should Jerry ignore her request because she was suffering. Due to immeasurable passion towards Pamela, Jerry feared that he would lose the former. The fear prompted him to accept Pamela’s desire and