Storage device Essay Example | Topics and Well Written Essays - 500 words

Storage device - Essay Example RAM, graphic card memory and cache are the common primary storage devices, and they hold data from secondary devices while it is being used by the computer. The primary memory does not store data for future use due to its small size and lack of capability to store data permanently since they require continuous electric current as opposed to magnetism in secondary devices. RAM has high speed and is accessed with minimal delays due to its direct connection to the CPU via memory buses. RAM is mainly used to store data located in programs and operating system and hence it is necessary that every computer has a secondary device for data storage. Secondary storage is also known as auxiliary storage and is defined as any storage devices that are volatile and may be located inside or outside the computer. Secondary storage devices serve as an addition to the primary memory, and their function is to store data permanently. Secondary storage devices can store data ranging from megabytes to petabytes depending on their storage capacity (Matick 18). Such devices store the installed applications, the operating system, drivers and any other information that the computer user is willing to save. Secondary storage devices do not have a direct connection to the CPU and instead they receive and send data to the CPU through I/O buses. The speed of the secondary storage devices is considerably as compared to that of the RAM and hence cannot transfer data quickly. These devices are advantageous since they store data magnetically, and it is retained once the computer is switched off. The most common type of secondary storage device is an internal hard drive, but there exists many other forms of secondary storage e.g. DVSs, floppy disks, external hard disks, am flash discs. Most secondary storage devices have speeds ranging from 3600RPM TO 7200RPM and are nonvolatile therefore being reliable in data storage and backup (Matick 18). Hard disks are advantageous because they are normally

Genetic and society Article Example | Topics and Well Written Essays - 250 words

Genetic and society - Article Example It benefits processors and farmers because its bruise resistance making it financially cost effective. The cons of innate potatoes are that, some researchers think that, though approved the technology is not regulated adequately as the methods used to suppress the genes are not well comprehended. Some of the substances important to the crop for pest protection and nitrogen use are also being suppressed. Consumers, restaurants and food companies have expressed health concerns by rejecting such crops for it may cause cancer. Simplot Company engineering the potato says the potato has genes such as bacteria and promises of its health benefits (Pollack, para.1-3, 9). In conclusion, the innate potato has both economic and health effects. The approval of this potato by the national potato Council has reservations. The food industry had been advised to reduce acrylamide levels by the F.D.A by issuing a guideline on potato handling from farm to cooking. Undoubtedly, many companies have adopted this measure and do not need the genetically engineered

Frankenstein by Mary Shelley Essay Example | Topics and Well Written Essays - 750 words - 1

Frankenstein by Mary Shelley - Essay Example In these regards, I faced no real difficulty or challenges when reading Frankenstein. Occasionally I came across vocabulary that I either wasn’t familiar with, or was perhaps typical of the nineteenth century that I stumbled upon, but nothing challenging to the point of disrupting the novel’s narrative flow. I believe the centering of the narrative around sensational and horrifying events greatly contributed to my interest and ease in understanding the novel. It’s this exciting nature that also led me to find the book highly intriguing and moving. There were many parts of the novel that I found intriguing and recognize that the down periods only existed so that they could be resolved in narrative climaxes. Probably the most intriguing element was Victor’s description of how he had received his education and his desire to discover the secret meanings of life, and his eventual realization of this in Frankenstein’s creation. I also found Victor’ s quest towards the novel’s conclusion to exact revenge on Frankenstein as perhaps the most moving; at this point I had become completely emotionally invested in the characters and read this section with both terror and impassioned interest. While there were many unfortunate instances in the novel, I feel most moved by the monster’s plight and loneliness, as it was not difficult to feel empathy for a lonely individual seeking a partner in life; later, the murder of Victor’s wife was also a highly moving and unfortunate element in terms of my emotional response to the novel. In reading Foster’s How to Read Literature like a Professor there were a number of features that aided and enhanced my interpretation of the novel. While I had experience examining symbols and latent meanings in novels from high school English classes, the book’s discussion of symbols really helped reframe

College entrance response Essay Example | Topics and Well Written Essays - 250 words

College entrance response - Essay Example In addition, there are abundant discussion rooms for students and a library for research. The university has abundant recreation facilitates for students. In addition, the students are allowed to participate in inter-university competitions such as sports, drama, debate and many other activities. The education programs offered at NU-Q gives students a chance to participate in leadership at different capacities. In addition, the university management organizes seminars and motivational talks for students. In this regard, students gain essential skills for surviving in the corporate world. The construction of a permanent home for NU-Q is anticipated to be complete by 2015. The new location is designed to offer a more comfortable learning environment for students. The new facilitate is expected to accommodate more student population and offer more opportunities for research and development. In summary, NU-Q emerges as the best media and arts institution in the region. The studies at NU-Q are not exam oriented but student

Facebook Effects on Society Essay Example for Free

Facebook Effects on Society Essay Nowadays, the social networking known also as social media has become a widespread subject among people, especially among teenagers. At its beginning, social media consisted of diverse dating websites. Now, most people consider that having a social media account means that you have a Facebook account. Facebook involves interactivity and the aim of it was, from the very beginning, to be able to add different people as friends and let those people know about the activities of their new friends. It was launched in 2004 and now is one of the most popular social media websites in the entire world. According to the last surveys in the field, Facebook changes and influences social relationships along with peoples ideas, thoughts and actions. There are several negative effects that Facebook has on the society, in general, and on the people, individually. Facebook causes addiction, which implies: less social interaction, distraction from another tasks and health issues. Since for many people searching and posting on Facebook has become one of the main daily activities, less social interaction begin to be one of the main negative effects that Facebook has on its users. Recent data shows that there are over 500 million Facebook users, which means 1 person in every 13 people on Earth uses Facebook. This social media website seems to be for people an escape from real life to a life where everything is fine and organized. In 2010, Pew Research Center created a survey on over 2,000 respondents about social networking influences and demonstrated that 92% of the social networking users have account on Facebook and 52% of them check their Facebook profile at least once a day. Overall, half of the actual Facebook users, which means 250 million people, checks their profile daily. And definitely, those who tend to check their profile many times a day are the ones who tend to get more attracted by the activities on Facebook and so, to be less interested in real life productivity. Christine Rosen, member of the Ethics and Public Policy Center from Washington, says People who use networks like Facebook have a tendency to describe themselves like products(BUGEJA 88). That less social interaction will begin once the Facebook users start feeling more connected with the others through Facebook. A research did by Alex Trimpe, student at Columbus College of Art Design shows that 57% of people talk more online than they do in real life (BATTISHILL). In addition, a report in Daily Mail confirmed that more than a third of the respondents spend less time on going out with friends than posting or chatting on Facebook. A percentage of 75 of the surveyed people have fewer friends since they started using Facebook as a way to keep friends updated and even if they realize they need more real meetings, Facebook is still the first choice for hanging-out and for meeting new people. This seems to be a new way of creating and maintaining friendship relations and Steven Strogatz, network science expert and PhD professor at Cornell University, confirms: The distinction between genuine friends and acquaintances is becoming blurred. Users are spending time maintaining relationships with people they dont really care about. (JARVIS) Another of Facebooks negative effects on society is the distraction from important tasks, which increases the inability to control important occupations such as working or studying. Michael Bugeja, professor and director of the Greenlee School of Journalism and Communication at the University of Iowa, named this generation The Facebook Generation who text-message during class, talk on their cellphones during labs, and listen to iPods rather than guest speakers in the wireless hall(Bugeja 85). Due to this extended presence on Facebook, the students encounter issues on tasks performances or in respecting due dates. For instance, a psychologist of the Centre for Learning Sciences and Technologies at Open University, Paul Kirschnera, and Aryn Karpinskib, a professor at Ohio State University, did a survey that shows that the average GPA of students without a Facebook account is around 3.86 while the Facebook users have a GPA of 3.06 (Choney). Paul Kirschnera affirmed in a Daily Mail article: The problem is that most people have Facebook or other social networking sites, their emails and maybe instant messaging constantly running in the background while they are carrying out other tasks(Fleming). Facebook has a well developed entertainment value and, also, an informative value and both make people get involved in discussions or any other activities allowed on this website. Their curiosity or pleasure in what they see or read encourages them to spend more time facebooking. For example, checking the last posts on their friends walls, changing constantly their status or using Facebook chat. Any social media activity longer than a few minutes interferes with peoples main occupation, in students case, homework, and it makes difficult to keep them focused on what is really important. The experts advice Facebook users to take tech breaks and check their profiles after at least 15 minutes of working on other different tasks. Last, but definitely one of the most dangerous effects of Facebook on society is that it brings a series of health risks. According to a Daily Mail report, people who often use social media tend to be more isolated, and they find it difficult to communicate in person. Doctor Aric Sigman, member of The Institute of Biology, says in The Biologist, This [isolated behavior] can increase the risk of health problems as serious as cancer, strokes, heart diseases, and dementia (BBC News). These health issues are more likely to appear in someone who spends more time socializing online than he does on face-to-face contacts. In addition, Dr Sigman underlines that some hormones such as stress released or oxytocin hormones, which help people to start and maintain social relationships, are altered in the people who do not have an active social life and who share their emotions and thoughts through Internet. It explains why many people who overuse Facebook are more vulnerable to stress, nervousness and isolation. Another health risk caused by an excessive use of Facebook is the chaotic habit of eating that people have, especially teenagers. If they spend most of their time on Facebook, they tend to skip meals or eating unhealthy food. According to researchers, t hese habits could lead to diseases like bulimia or anorexia. A survey based on a sample of 600 Facebook users with ages between 16-40 and done by The Center for Eating Disorders, reports that 75% of the respondents do not like how their body looks and 51% of them compare their bodies with their Facebook friends’ bodies (Cowden). Doctor Harry Brandt, director of The Center for Eating Disorders mentions, â€Å"Facebook is making it easier for people to spend more time and energy criticizing their own bodies and wishing they looked like someone else [] In this age of modern technology and constant access to SmartPhones and the internet, it’s becoming increasingly difficult for people to remove themselves from images and other triggers that promote negative body image, low self-esteem and may ultimately contribute to eating disorders (Shaffer). Many people become obsessed with that ideal thin body and the results of the survey mentioned above underlines that people tend to pursue a weight-loss diet because they draw a negative image of their bodies when comparing with other users images. It is clear that, at one point, Facebook is enjoyable and its policy is not other than to bring people together faster and easier, though it still affects peoples lives in many ways. Some people are more liable to be isolated from real life, which include in person connections and real entertainment activities. Others end up losing their jobs or getting low grades, in students cases, because of the time spent on Facebook. Some could become sick because of the obsession of having that perfect body image, which Facebook promotes, and they start pursuing wrong diets plans, which lead to improper meals. A large numbers of surveys show the negative effects of Facebook to society and the doctors are also worried about the approach that society have for social media websites, especially Facebook. Generally speaking, Facebook mostly affects many people because they neglect real life and spend way too much time on chatting, posting on and checking their profile. The risks and the negative sides of social media will be reduced if the people will use a lower amount of virtual socializing. WORKS CITED BBC, News Online networking harms health.† N.p 09.02.2009. Web. 18 Apr 2012. . Black, Nathan. Facebook Depression Affecting Teens, Report Says. Christian Post 29 March 2011, n. pag. Print. Bugeja, Michael. Facing the Facebook. Chronicle of Higher Education 27 February 2006, Daily Ed. n. pag. Print. Choney, Suzanne. Facebook use can lower grades by 20 percent, study says. N.p., 2010. Web.

Donnie Darko - Detailed Summary Essay Example for Free

Donnie Darko Detailed Summary Essay Donnie Darko is an intelligent, yet delirious and emotionally-ill teenager, whos idealistic fantasy of correcting the wrongs in society, finally appears possible in a tangent universe (an imaginative reality), where he is guided by an imaginary friend Frank, who appears as a malevolent giant bunny in Donnies day-time hallucinations. In the early stages of the film, Frank literally lures Donnie from reality and introduces him to a tangent universe where Donnie observes what wouldve been, (yet ultimately is) his own death in reality, where he is crushed by a plummeting airliner engine that crashes through the roof of his house directly above his bedroom where he sleeps. In the tangent reality though, he is merely a bystander, bemused and frightened by the calamity of the aftermath, as he returns home the morning subsequent to the disaster. He realizes that his long sleep-walk adventure the previous night, (Summoned by Frank) had ensured the avoidance of his death. The viewer is initially under the impression that Frank is a product of Donnies disturbed and inventive sub-conscious, as he is but a vehicle to allow Donnies inhibitions to express themselves through acts of desecration. In many ways, Frank seems to take advantage of Donnies mental state by coercing him to perpetrate crime. Yet Donnie appears to advocate his own actions, indicating his intentions for societal change, reformation, and also for companionship he fears the prospect of dying alone, in which case, Frank is an ally who can assist Donnie in coping with his emotional struggles and hardships. The fact that Donnies mental condition is later classified as paranoid schizophrenia by Dr Thurman (Donnies psychiatrist), would appear as another viable theory or impression, for the viewer to follow. However, it proves not as strong. The reason being, is that the initial or aforementioned theory supports the films noteworthy theme that destruction is a form of creation (an idea propagated by Donnies secondary literacy teacher, Mrs. Pomeroy), whereas the latter is a shallow, yet logical conclusion that isnt glaringly in keeping with any underlying messages of the film itself. Later in the film, the tangent universe allows for the discovery of Frank, as an authentic person, who is murdered by Donnie as he is directly responsible for a fatal car accident involving Donnies much- adored tangent girlfriend, Gretchen. This enlightens us as to the reason for Franks contact with Donnie. Frank has traveled back through time, to in-turn; open a port-hole to Donnies future and enable Donnie to view aspects of his life ahead as a series of visual manifestations, (ie post airliner engine catastrophe). In doing this, he informs Donnie that Armageddon will arrive in twenty-eight days, which conveniently serves as a manipulative motive to aid his primary objective: To discourage Donnie in continuing his life in reality; in the hope that Franks life will be spared. At this point in the film, the recurring theme of time travel claims its stronghold, regardless of previous acknowledgements and inferences. For instance, in one particular scene Frank implies he is from the future, and in numerous others, Donnie is seen eagerly researching and discussing theoretical revelations, pertaining to the philosophy of time travel. Evidently though, these scenes and others, such as the Frank-influenced despoilment of Donnies school and the arson of a corrupt perverts house, illustrate critical stages of Donnies inner journey that is, from a disillusioned teenager, troubled by the folly of mainstream attitudinal beliefs, to an individual who transcends reality in order to subsist in an idealistically superior society, of his own invention. After twenty-seven days of endeavor through outrageous public displays and clandestine defilement, the foretold event of Armageddon looms near. Donnie ambles through the final moments of his tangent existence (inner journey), as his character-defining tenacious dynamism begins to fade. As expected, he assumes his fatalistic mentality of all living things have a set path, and that humans are merely vessels traveling along Gods channel, gradually nearing a pre-determined destination. At this stage, Donnies mindset suggests a search for spiritual solace and religious meaning. Whilst denying an utterly defeatist outlook, Donnie exerts a courageous exterior by modestly welcoming his fate, in the hope that there will be so much to look forward to. He is of course referring to a reformed humanity that is devoid of inadequacy, corruption and suppression. It is here, that the film takes an unexpected turn, whereby Donnies inner journey in the tangent universe is virtually thwarted due to the sub-conscious acknowledgement of an audible phrase, originally voiced by his late girlfriend, Gretchen. It is part of her conjecture of emotional solace: What if you could go back through time, and replace all those hours of pain and darkness with something better? At this point, Frank uses his god-like essence to summon Donnie in reality, assuming that hed been subjected to enough to be dissuaded, and, much to the viewers astonishment, Donnie awakes in bed, hysterically laughing in awe and disbelief of his dream. Whilst conscious, he remembers the tangent visions of pain and anguish, including Gretchens death, and the murder of Frank, and decides that his future should be exempt from more emotional suffering. Donnie opts to conclude his inner journey heroically, by means of self-sacrifice that is, to allow the plummeting airliner engine to destroy him, thus ensuring an extended life for his beloved female tangent counterpart, Gretchen. The film Donnie Darko is significant to the theme of imaginary journey as it details a persons sinister epigrammatic voyage into the future, and consequent development of emotional alteration. Director Richard Kelly uses the character Donnie as a representation of idealistic thought inherent in society. It is no undisclosed fact that society itself, is pervaded by thoughts and ideals that are in contrast with expected societal opinion. Kelly hints at the notion that we are engaged in the journey of life, yet our propulsion is suppressed somewhat, by the  undeniable need to conform to societys bounds and restrictions thus society would seem to preclude humans from achieving their primary goal(s) or concluding their journeys. Also intertwined with this perception, is the suggestion of the faà §ade of human nature. Kelly suggests it is unnatural for veritable human inclination to be constrained, hence the rationale of life-long journeys that are embarked upon to discover a sense of self. Donnies self discovery is shown through his sacrifice for Gretchen. Whilst on his imaginary journey, Donnie identifies with her troubled emotions and sinister background of family trauma. He discovers a person remarkably similar to himself, so his sacrifice in essence could be perceived as an effort of self-preservation as he was intent on ensuring continuity of his spirit within a physical entity other than himself. This is a viable interpretation, relevant to a reflective inner journey, as it is a primary motive for initial commitment to the journey itself. Kelly realizes that Donnies journey is exceedingly implausible and unrealistic. Without detracting from the intended solemnity, it seems a feat such as Donnies could only be surmounted by a philosophical super-hero with ethereal powers. Kelly deliberately captures the fervent yet slightly naà ¯ve central vision of Donnies ideological expectations in the films title, and in Donnies heroic bravado. Nonetheless, he encourages provocation of thought and motivational urge on our set path in life, or inner journey. The reason being is that humans are inclined to stray from reality, if indeed; there is an absence of true accomplishment in their existence. By this, Kelly infers that an inner journey is necessary to undergo, as it induces self-gratification and contributes to the conservation and perpetuation of ones psyche. Director Richard Kelly uses the medium of time travel to symbolize the eternal human endeavor/journey in Donnie Darko. I use eternal, because we yearn for such an easy method as time travel to reveal future outcomes and destinations, yet we are simultaneously disenchanted by its obvious  impracticalities. Kelly expresses his interpretation of fatalism via liquid spears, which consist of water and metal, and appear as a cylindrical protrusion from a humans chest. In the scene known as the liquid spear waltz, (tangent universe), Donnie in his hallucinatory state, sees these spears connected to the chests of his friends and family. He observes that the individual always follows the path of the spear, to their immediate destination. For example, Donnies spear leads him to the fridge on one occasion, whilst he was thirsting for a drink. He wouldve made that same trip even if the spear wasnt there. Furthermore, the inclusion of mystical activity in the film, such as the liquid spear, adds to the surrealism of the tangent universe, reinforcing the imaginary focus of Donnies journey. Kelly has portrayed the same dream-like atmosphere via other medium also. For example, many of the tangent universe scenes are in slow-motion, and filmed from an aerial perspective. This informs the viewer of the simulation of the tangent universe, whilst creating a mystic atmosphere and mood. Finally, Kellys concept of fatalism may well be perceived as a mere scapegoat for human failure, yet such a perception would be grossly incorrect. He emphasizes that; we shouldnt knowingly inhibit ourselves because we travel on a set path in life. If anything, a pre-determined future should provide motivation, and encourage one take advantage of daily opportunities and prospects. After all, we are oblivious as to when exactly, our journey of life shall ultimately cease.

Cardiovascular, Respiratory and Gastrointestinal System

Cardiovascular, Respiratory and Gastrointestinal System Emily Joll Part 1- Explain the anatomy of the cardiovascular system and the role played by each of the major parts. (Word Count 400) The cardiovascular system is made up of specialized structures allowing it to effectively carry out its role of transporting blood and nutrients around the body and removing toxins. The cardiovascular system is a closed double circulation system consisting of the major structures of the heart and a network of blood vessels. The heart is structured into two sides which is then divided into two chambers, resulting in a total of four chambers. The system is known as a double circulatory system as the right half of the heart pumps blood to the lungs, becoming oxygen enriched, and back to the heart, known as pulmonary circulation (DLC Topic 1, 2014). The left half pumps the oxygen enriched blood around the body and then back to the heart, known as systemic circulation (DLC Topic 1, 2014). The top chambers of the heart are called atria, and the lower chambers ventricles. The atria are designed to receive blood from the body and pump it into the ventricles. This is a short distance for the blood to travel so the atria only lightly pump aiding the efficiency of the ventricles. This low level of action required results in the muscle walls of the atria are thinner than that of the ventricles. The atria and ventricle on each side are connected by atrioventricular valves. These valves prevent back-flow of blood int o the atria from the ventricles aiding the efficiency of the pumping action. When the ventricles contract the blood within them is pumped out of the heart to the body through the aorta on the left side, and pulmonary artery on the right. The arteries have very thick elasticated walls able to withstand the pressure exerted on them from the pumping action of the ventricles. Arteries pulse to aid the pumping action of the heart and movement of blood around the body. From the arteries the blood continues to move through a network of blood vessels, delivering oxygenated blood to the cells and removing toxins. Veins carry deoxygenated blood back to the heart. The pressure is less in the veins as the blood has travelled a long way since it was originally pumped. This results in the walls of veins being thinner. To aid the movement of blood back to the heart due to the lowered pressed, veins have values in them to prevent back-flow of blood. Capillaries are the small blood vessels that link the veins and arteries, and carry the oxygen and nutrients to the cells. The walls of capillaries are very thin to allow for the actual exchange of these gases and nutrients to take place completing the actual role of the cardiac cycle. Actual Word Count 434 References DLC Topic 1, 2014- Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Waugh, A. and Grant, A. (2006) Ross and Wilson Anatomy and Physiology in Health and Illness- The Musculoskeletal System, 10th edition, Edinburgh: Churchill Livingstone Part 2- Explain the structure of the respiratory system by completing the table below. (Word Count 300) Actual Word Count 325 References DLC Topic 2, 2014- Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Jones, G. and Jones, M. (2004) Human Biology for AS, 1st edition, Cambridge, Cambridge University Press Waugh, A. and Grant, A. (2006) Ross and Wilson Anatomy and Physiology in Health and Illness- The Musculoskeletal System, 10th edition, Edinburgh: Churchill Livingstone Part 3- Explain the structure of the gastrointestinal system using the table below. (Word Count 300) Actual Word Count 330 References DLC Topic 3, 2014- Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Waugh, A. and Grant, A. (2006) Ross and Wilson Anatomy and Physiology in Health and Illness- The Musculoskeletal System, 10th edition, Edinburgh: Churchill Livingstone Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Waugh, A. and Grant, A. (2006) Ross and Wilson Anatomy and Physiology in Health and Illness- The Musculoskeletal System, 10th edition, Edinburgh: Churchill Livingstone TAQ 2 (AC 1.2 2.2) Write a short account explaining how oxygen gets from the environment to the cells and vice versa. (Word Count 400) Oxygen reaching cells is vital to the life of an organism and is a complicated process involving the respiratory system and cardiovascular system working together. Working on a negative feedback loop, sensors in the carotid artery monitor the pH level of blood. Toxins that are produced by the body through energy use and respiration cause a build up of these in the bloodstream, which can be removed through exhalation. The medulla oblongata in the brain stem controls involuntary inhalation and exhalation of air and will increase or decrease the respiratory rate as necessary to regulate the pH level of the blood (DLC Topic 2, 2014). When signalled for inhalation to occur the diaphragm and the intercostal muscles between the ribs contract, increasing the volume of the chest and thoracic cavity, so the lungs and alveoli can expand. This decreases the pressure inside the chest and causes inhalation. Air enters the upper respiratory tract through either the nose or mouth, being filtered and warmed in the process, and is drawn down into the lower respiratory tract. Once the air reaches the alveoli gaseous exchange takes place. The alveoli walls are a s ingle cell thick and surrounded by a network of capillaries to allow the process to take place rapidly. The concentration of oxygen in the alveoli is greater than that in the blood in the capillaries so the oxygen moves with the concentration gradient by diffusion to increase the oxygen in the blood plasma in the capillaries. Haemoglobin in the red blood cells in the capillaries absorb the oxygen forming oxyhaemoglobin. The oxyhaemoglobin then moves through the bloodstream due to the action of the cardiovascular system. Blood is pumped through the pulmonary vein into the left side of the heart, moving through the atria and ventricle to the aorta. The aorta is the main artery from the heart taking oxygenated blood out to the blood vessels of the body. This blood is pumped through the other arteries, veins and capillaries of the cardiovascular system. Once in the capillaries oxygen and nutrients are transferred to the cells through diffusion. Through this process waste products from c ells are also transferred back into the blood stream, e.g. carbon dioxide. The deoxygenated haemoglobin and the waste products then travel back through the blood stream to the heart on the right side. Once at the heart it is pumped back to the lungs where the concentration gradient of the products are uneven and are equalised through diffusion once more. The haemoglobin becomes oxyhaemoglobin, and the waste products e.g. carbon dioxide are diffused into the lower respiratory tract and expelled from the body through exhalation and the process repeats itself. Actual Word Count 439 References DLC Topic 2, 2014- Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiratory System [Course Materials] Distance Learning Centre 2014 Introduction to Cell Biology Topic 1 Introduction to Cell Biology [Course Materials] Livestrong online 2013- Livestrong How Do the Digestive and Respiratory Systems Work Together?, Hendrickson. K, online accessed 18.05.2015 available at: http://www.livestrong.com/article/302607-how-do-the-digestive-respiratory-systems-work-together/ Waugh, A. and Grant, A. (2006) Ross and Wilson Anatomy and Physiology in Health and Illness- The Musculoskeletal System, 10th edition, Edinburgh: Churchill Livingstone TAQ 3 (AC 3.2) Using examples give a short account of the role of enzymes within the process of digestion. (Word Count 300) As soon as food enters the mouth the role of enzymes in the chemical digestion of food begins. As well as saliva, the saliva glands in the mouth release the enzyme amylase beginning the process. Here immediately the chemical breakdown of carbohydrates starts. Once the food bolus formed in the mouth is swallowed and reaches the stomach further chemical digestion occurs. The lining of the stomach walls contain several cells with secrete chemicals that enable digestion. Many of the enzymes released are highly corrosive so work together to protect the stomach itself whilst continuing chemical digestion and destruction of microbes found in food. Microbes, which carry disease are killed by the action of the enzyme hydrochloric acid, released by parietal cells. This hydrochloric acid, activates an inactive enzyme in the stomach, pepsinogen, resulting in pepsin. This is the resulting enzyme which enables the breakdown of proteins to amino acids. Once digestion has taken place in the stomach the result is a liquid known as chyme which is secreted into the small intestine. Within the small intestine the brush boarder enzymes are housed amongst the villi and microvilli (DLC Topic 3, 2014). Brush boarder enzymes are a collection of different enzymes which line the small intestine working individually, and together to activate inactive enzymes, to continue the breakdown the different components within the chyme. The enzymes here aid the digestion of fats and of starches into simple sugars. Enzymes play a vital role in the gastrointestinal system as they enable the foods to be broken down into their chemical components which are useful to the body and can be reabsorbed for use or eliminated through waste. Actual Word Count 271 References DLC Topic 3, 2014- Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] TAQ 4 (AC 3.3) This unit discusses the systems that supply the cell with everything that it needs. How do the three systems discussed function in supporting the cell? Part 1- Cardiovascular system (Word Count 100) The pumping action of the heart and the blood vessels in the cardiovascular system, creates and facilitates a continuous flow of blood products, oxygen and nutrients around the body. This creates a replenishment system, delivering products required by the cells through diffusion in order for them to function efficiently. This system also creates a removal system for toxins and waste products from the cells. These products are removed from the cells back into the bloodstream through the process of diffusion where they can be transported away from the cells for elimination from the body. Actual Word Count 94 Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 1 The Cardiovascular System [Course Materials] Distance Learning Centre 2014 Introduction to Cell Biology Topic 1 Introduction to Cell Biology [Course Materials] Part 2- Respiratory system (Word Count 100) The respiration system facilitates inhalation of air into the body, supplying the oxygen that every cell in the body requires to function. There is a percentage of oxygen in the air which is diffused into the bloodstream from the alveoli in the lower respiratory tract. The respiratory system not only brings oxygen into the body, the bloodstream and therefore the cells but also provides a pathway for waste gases to be expelled from the body through exhalation, removing toxins from the system that would otherwise overload it and cause cell death. Actual Word Count 91 Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiration System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 2 The Respiration System [Course Materials] Distance Learning Centre 2014 Introduction to Cell Biology Topic 1 Introduction to Cell Biology [Course Materials] Part 3- Gastrointestinal system (Word Count 100) The gastrointestinal system provides a pathway from the mouth to the anus for food entering the body to exit as bulk waste once the goodness from it has been absorbed by the body. It facilitates the mechanical and chemical digestion of food to its component parts that can then be reabsorbed by the body for use in the cells as energy or to create new proteins as required or expelled. Through its use of enzymes this system supplies the cells with the minerals, vitamins, water, essential amino acids and ions they require to function effectively., whilst removing unnecessary food bulk through the elimination of faeces. Actual Word Count 105 Reference List Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] Bibliography Distance Learning Centre 2014 Cardiovascular, Respiratory and Gastro-Intestinal Systems Topic 3 The Gastro-Intestinal System [Course Materials] 1