Learn About the 3 Main Stages of Cellular Respiration

Learn About the 3 Main Stages of Cellular Respiration We all need energy to function, and we get that energy from the foods we eat. Extracting those nutrients necessary to keep us going and then converting them into useable energy is the job of our cells. This complex yet efficient metabolic process, called cellular respiration, converts the energy derived from sugars, carbohydrates, fats, and proteins into adenosine triphosphate, or ATP, a high-energy molecule that drives processes like muscle contraction and nerve impulses. Cellular respiration occurs in both eukaryotic and prokaryotic cells,  with most reactions taking place in the cytoplasm of prokaryotes and in the mitochondria of eukaryotes.   There are three main stages of cellular respiration: glycolysis, the citric acid cycle, and electron transport/oxidative phosphorylation. Sugar Rush Glycolysis literally means splitting sugars, and it is the 10-step process by which sugars are released for energy. Glycolysis  occurs when glucose and oxygen are supplied to the cells by the bloodstream, and it takes place in the cells cytoplasm. Glycolysis can also occur without oxygen, a process called anaerobic respiration, or fermentation. When glycolysis occurs without oxygen, cells make small amounts of ATP. Fermentation also produces lactic acid, which can build up in muscle tissue, causing soreness and a burning sensation. Carbs, Proteins, and Fats The Citric Acid Cycle,  also known as the tricarboxylic acid cycle or the  Krebs Cycle,  begins after the two molecules of the three carbon sugar produced in glycolysis are converted to a slightly different compound (acetyl CoA). It is the process that allows us to use the energy found in carbohydrates,  proteins, and  fats. Although the citric acid cycle does not use oxygen directly, it works only when oxygen is present. This cycle takes place in the matrix of cell  mitochondria. Through a series of intermediate steps, several compounds capable of storing high energy electrons are produced along with two ATP molecules. These compounds, known as nicotinamide adenine dinucleotide (NAD) and flavin adenine dinucleotide (FAD), are reduced in the process. The reduced forms (NADH and FADH2) carry the high energy electrons to the next stage. Aboard the Electron Transport Train Electron transport and oxidative phosphorylation is the third and final step in aerobic cellular respiration. The electron transport chain is a series of protein complexes and electron carrier molecules found within the mitochondrial membrane in eukaryotic cells. Through a series of reactions, the high energy electrons generated in the citric acid cycle are passed to oxygen. In the process, a chemical and electrical gradient is formed across the inner mitochondrial membrane as hydrogen ions are pumped out of the mitochondrial matrix and into the inner membrane space. ATP is ultimately produced by oxidative phosphorylation- the process by which enzymes in the cell oxidize nutrients. The protein  ATP synthase uses the energy produced by the electron transport chain for  the phosphorylation (adding a phosphate group to a molecule) of ADP to ATP. Most ATP generation occurs during the electron transport chain and oxidative phosphorylation stage of cellular respiration.

Annual and Anniversary

Annual and Anniversary Annual and Anniversary Annual and Anniversary By Maeve Maddox A non-native English speaker wonders about this use of the word anniversary in a business communication: The prices and products below are based on a 36-month contract, free unit and free installation. Tracker experiences an across-the-board anniversary increase (inflation based) every October. The reader comments, I cannot remember ever seeing â€Å"anniversary† used in this context. I would have expected a word such as â€Å"annual.† The usage sounds odd to a native speaker as well. Both words, annual and anniversary, derive from the Latin annus, â€Å"returning yearly.† Anniversary entered the language as a noun in the early 13th century with the meaning â€Å"day of a person’s death.† In church use, anniversary came to be used attributively in the phrase â€Å"anniversary days,† dates on which saints or martyrs were celebrated. Annual came along as an adjective about 150 years later in the context of paying an â€Å"annual wage.† Although both words can function as either noun or adjective, in modern usage, anniversary is used primarily as a noun and annual as an adjective: The Queen to celebrate the 70th anniversary of VE Day at a Westminster Abbey service with veterans   Penguin Celebrates 80th Anniversary Annual price increases are common in B2B [business-to-business] subscriptions. The  Annual Picnic  is usually a purely social event, and everyone is encouraged to attend. Although both words refer to a yearly event, anniversary carries connotations of celebration and remembrance, whereas annual is a workaday word meaning â€Å"occurring once a year.† In observing an anniversary, one might speak of â€Å"an anniversary celebration† or â€Å"an anniversary dinner,† but in a business context, it’s more idiomatic to speak of â€Å"annual meetings† and â€Å"annual price increases.† Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:7 Types of Narrative ConflictCapitalization Rules for the Names of GamesHow to Punctuate Introductory Phrases

1968 in U.S. History Essay Example | Topics and Well Written Essays - 1000 words

1968 in U.S. History - Essay Example The period is characterized by the entrenching of the U.S in an unpopular war in Vietnam, while violence, experimentation, unrest, and outspokenness spread throughout the nation. Leaders were assassinated on an outwardly regular basis, the Civil Rights Movement got more powers, and psychedelic music and social experimentation were rampant in most parts of the country. Many scholars view this year as shameful, divisive, or sometimes as a year that galvanized change in America. 1968 was an apex of the gradual upheaval of the 1960s. Tension that had been accumulating for the past years ultimately came to head, across a whole year of violence, revolution and grief. Dr. Martin Luther King Jr. and Robert Kennedy were assassinated; unrest was rampant in Democratic National Convention, as the media covered the Tet Offensive to expose the horrible account of the Vietnam War. The fighting in the Saigon streets during the Tet Offensive or New Year made the Vietnam too real. According to one UPI reporter, the Vietnam in this year meant a first look at death. Photographers scampered from building to building gathering photos on the fighting in the outcasts of Saigon. The North Vietnamese communist groups’ launch of the Tet Offensive in January and its success against South Vietnamese and U.S troops caused discontent and shock across the home front and marked the most intense times of anti-war disputes to date. Apart from being the most difficult and saddest year in America, 1968 was also a presidential election year. President Lyndon Johnson was on the forefront in promoting civil rights legislation but he had also greatly increased American possibility in involving in the Vietnam War. It was therefore not easy for him to leave the White House without protesters being involved; he no longer had majority support and thus announced that he would not contest for the presidency. Eugene McCarthy, a senator from Minnesota engaged in these elections and succeeded in the pri maries. Following his success, New York’s Senator Robert Kennedy decided to enter the campaign too. For a long time then, Kennedy had served in one of the highest legal offices in the nation as Attorney General in the administration of his late brother, John Kennedy. Upon his announcement to run for presidency, most citizens were very pleased with his massage, where he promised to end the Vietnam war, and to reduce racism and poverty both in America and in the whole world. Another serious event was noted in April fourth, the same year; Martin Luther King, America’s top civil rights leader was shot to death in Tennessee. He was helping to negotiate a strike between the management and sanitation employees. This made Kennedy to deliver a speech to black citizens, convincing them that what had happened was against the wishes of Americans, since they disliked hatred, lawlessness, and violence, but embraced wisdom, love, and justice. However, these words did not calm down th e black community. Their leader, Luther had peacefully led civil rights movement, yet his death cultivated violence in more than one hundred cities nationally. Soldiers were called upon to settle the riots, and hundreds of citizens lost their lives or were injured. As the primary elections went on, Robert Kennedy and Eugene McCarthy tried to show how their ideologies differed, but voters could not notice the differences. They both opposed the Vietnam War; sought enhancements in civil rights; and both promoted social reforms. Kennedy led in primaries in Nebraska and Indiana, while McCarthy led in Oregon. California had the next big primaries, and Kennedy stated that he would withdraw if he was defeated in this significant contest. He won the elections and

HOMEWORK Essay Example | Topics and Well Written Essays - 750 words - 1

HOMEWORK - Essay Example Q1 (II): considering that the ratio of trade is 1:1 and that north is more efficient in producing both left and right shoes as compared to the south, the north will consume 70 pairs of shoes. That is, the north would rather not trade. On the other hand, with no increase in the number of workers in the south, they can only consume one pair of shoes if they give up one-left shoes for one right shoe (Miles & Scott 15-72). Q1 (III): assuming that there still are 10 workers in the North, the new exchange rate will be (300:3000), (100:1000) = 1:10. Therefore, the North could decide to exchange 30 left shoes for 300 right shoes. In this case, the number of pairs of shoes consumed will be 300 (Miles & Scott 15-72). Q2: the Federal reserve governor meant that in the year 2005, the payment made by the U.S for importing services and other visible and invisible goods were more than those received; leading to a current account deficit. In the process, the value of US currency decreased making U.S products cheaper in the international market. A decreased U.S currency means an increase in the value of foreign currencies leading to low foreign prices, thus low interest rate in the long-run (Arize 35-67). Q3: when the Government’s purchases increase during a war, consumption is concentrated on ammunitions. The country will heavily import the war machines than exports. This will lead to a deficit in trade account (a negative balance). To pay for the imported machines, more local currency will be supplied in the foreign exchange market than is demanded. Due to more supply than demand, the local currency will lose its value. The decreased value will be reflected in the exchange rate. Therefore, the real exchange rate will be lower. That is, the real price of the local currency against foreign currencies will be lower. The aforementioned effects would take place, whether a local or a

The Warm and Cold Blooded Nature of Dinosaurs :: Anthropology Essays Paleontology Papers

The Warm and Cold Blooded Nature of Dinosaurs The debate of whether dinosaurs were cold blooded or warm blooded has been ongoing since the beginning of the century. At the turn of the century scientists believed that dinosaurs had long limbs and were fairly slim, supporting the idea of a cold blooded reptile. Recently, however, the bone structure, number or predators to prey, and limb position have suggested a warm blooded species. In addition, the recent discovery of a fossilized dinosaur heart has supported the idea that dinosaurs were a warm blooded species. In this essay, I am going to give supporting evidence of dinosaurs being both warm and cold blooded. I will provide background information on the dinosaur that was discovered and what information it provides scientists. Until recently, scientists believed the chances of finding a fossilized dinosaur heart were extremely slim. The heart belonged to a 66 million year old dinosaur found in Harding County in Northwestern South Dakota. The dinosaur, found in 1993, weighed over 650 pounds and was 13 feet long. The dinosaur was in fairly good condition with the exception of the left side of the skeleton. The small, plant-eating Thescelosaurus, nicknamed ‘Willo’ has been acquired by the North Carolina Museum of Natural Sciences. Thescelosaurus was an ornithischian, or "bird-hipped," dinosaur that lived in the latter stage of the Cretaceous period. This was approximately 1 million years before the end of the dinosaur era. Native to North America, its range extended from the northern United States up into Canada. Since using the 3-D software to reveal Willo's heart, scientists have also used it to create 3-D images of the fossil's skull, and of remains from other dinosaurs in the museum's collection. (Fisher, Paul) A group of scientists from North Carolina and Oregon used medical technology to search an iron-stained concretion inside the specimen’s chest. With the assistance of imaging equipment and software, they were able to reconstruct 3-dimensional structures through the interior of the concretion. The images reveal a heart that was more like that of a bird or a mammal than those of reptiles, significantly adding to evidence suggesting that at least some dinosaurs had high metabolic rates. In addition, the heart appears to have been four chambered with a single aorta, which is most commonly found in mammals or birds.

Importance of Accounting Ethics Essay

Ethics is a branch of philosophy that judge human beings on wrongs and rights concerned with the nature of value and the standards by which human actions can be judged .The term is also applied to any system or theory of moral values or principles. Accounting is the mechanism that offers information regarding the financial position of the organization or business. This type of information is critical to investors as it provides them with important and detailed information that could turn out to be the determining factor as to their decisions to invest or not to invest in a particular organization. Accounting in business is one of the most important departments. Ethical and professional accounting forms a clear financial image of a business, and allows managers to make informed decisions, keepsinvestors abreast of developments in the business, and keeps the business profitable. (Osanyin, 2008) In accounting, there is the professional ethics that guides the accounting profession. Accountants are expected to adhere to the set ethical standards which are designed to ensure that they behave in a way which is ethical and consistent. For most professional accounting organizations, accountants are certified in order to comply with ethics and they are stripped off their certificates if they fail to abide with ethical codes. Therefore, it is common to find unethical behavior in accounting profession. Some of the forms of unethical behavior in accounting are, Providing erroneous information regarding expenses incurred in business Giving out false information on expenses purposely is unethical. In accounting profession, the accountant should always provide the correct information regarding any expenses as failure to do so make the financial status of the business to be false. This affects the profit and loss reports of the business and consequently affecting the performance of the business in the long run. Exaggerating business revenue In accounting practices, all revenue in the business should be reported correctly as this can hurt investors in the company, the tax payers who may be caught up in governments bail outs and the workers at the company. By showing the correct revenue generated, this reflects the true financial position of the company. Misuse of business funds Accountants access most of the funds in the organization and it is unethical to misuse them. This can lead to the closure of the business and eventually leads to the loss of jobs and investments. Accountants should never misuse business funds and if they use it should be reported in the books of accounts and debited clearly. Some of the reasons why ethics is important in accounting are;- Confidentiality: People need to have confidence in accountants and the services they provide. Failure to do so leads to uncertainty in investors, shareholders and the work force in the organization. If the quality of the accounting is unprofessional this leads to low confidence with the stakeholders of the organization. Professional Competence: Ethics in accounting ensures that the accountants maintain professional knowledge and skills at the level required to ensure that a client or employer receives competent professional service. This is exhibited by acting diligently and in accordance with applicable technical and professional standards when providing professional services. So as to maintain law and regulations governing the accounting profession, accountants should always observe the professional ethics in their profession.

Homelessness Affects On Modern World - Free Essay Example

Sample details Pages: 2 Words: 602 Downloads: 9 Date added: 2019/03/26 Category Society Essay Level High school Topics: Homelessness Essay Did you like this example? The stories we, as a country, often promote are of rags-to-riches tale, the American Dream, Hollywood, the democratization. Yet, poverty is something our nation takes pains to ascribe to any other parts of the world. However, dire poverty goes on in this nation. In fact, a little over half a million people are homeless on any given night in the United States (The State Of Homelessness). In this half a million population, approximately 4,177 people are homeless in just Portland, roughly 6% are children (Harbarger). Homelessness affects the lives of all Oregonians, not just those that were forced to live on the streets accompanied by the pouring rain and cold or the brilliant sun and debilitating heat. Regardless of the weather, being homeless in whatever season is not a walk in the park. But along with the weather, theres also the health concerns. Perhaps health issues can contribute to poverty and homelessness, however, experiencing poverty and homelessness may also contribute to health concerns. Approximately 80 people died on the streets of Portland in 2016 (Harbarger). Deaths due to hypothermia or heat stroke are not uncommon, neither is health issues stemming from substance abuse or mental illness. There is also a prevalent population of homeless that suffers hypertension and diabetes compared to the general population as well (Bernstein). Don’t waste time! Our writers will create an original "Homelessness Affects On Modern World" essay for you Create order These conditions all contribute to the significant premature mortality in the homeless population. However, most of these deaths could have easily been avoided, but factors such as extreme poverty, inadequate access to healthcare, nonadherence to treatments, and the health effects of homelessness itself contribute to this health risk. For this reason, additional health care and housing assistances will be needed to meet the rapid, growing homeless population. While the city of Portland has been attempting to tackle the problem by investing in shelters and other services to help the homeless population, perhaps it isnt enough to move people out of homelessness. Despite the millions spent over time, the comprehensive solutions have proven elusive. So if we want to end this social concern, we need to look into prevention, rather than just solutions. This could include educational programs, interventions designed to address problems that may consequently contribute to homelessness, well before they arise. Various factors may contribute to ones risk of homelessness, as mentioned earlier, however, some factors will be more prevalent in certain communities than others. This will aid in the decisions on whom to target for prevention assistance. Thus, the predictive factors will allow us to screen those with high homelessness risk and target resources towards the highest-risk individuals. While it is obvious that living without a permanent roof has serious impacts on the health and well-being of individual, homelessness is also a community issue. As the number of those living in the shelters or on the streets in search of a place to lay their heads continues to exponentially grow, the community is affected by the increased in demands on services and supports. While advocates for the homeless insist that we need more tolerance for the citys homeless population, the not-in-my-backyard (NIMBY) behavior is quite prevalent. Theres no doubt that when large numbers of people congregate in areas not meant to support the needs of homeless, public disorder such as loitering, public urination, trash, etc., can ensue. Hence, the NIMBY phenomenon. Yet, where then, does that leave us, when even the most basic of human rights food security and clean water are denied to people? In fact, its a situation that is becoming more dire with every passing day that opposing to help will not solve this issue and will continue to affect the community.