Similarities Between Mitochondria And Bacteria Biology Essay

Similarities Between Mitochondria And Bacteria Biology Essay Bacteria are believed to be among the oldest cells on Earth, fossils indicate bacteria-like organisms were around almost 3.5 billion years ago. They are unicellular micro-organisms that lack a membrane bound nucleus and contain no organelles. Many people consider them to be the cause of many diseases, which they are, but the human body contains trillions of bacteria, aiding processes such as digestion and growth. Mitochondria on the other hand are organelles found in the majority of eukaryotic cells, they produce energy in the form of adenosine triphosphate (ATP). What could these organelles found in eukaryotes have in common with bacteria, which are prokaryotes? Hopefully this essay will address that question and attempt to answer it. To achieve this in the first section of this essay I will consider the structural similarities between them both. I will then go on to compare the functional similarities in the second section of this essay which will then be followed by a section outl ining and explaining the endosymbiotic theory which should help to clarify the previous sections. Finally I will summarise the similarities between mitochondria and bacteria and the causes of these similarities and the validity of the theory explaining them. Structure At first glance bacteria and mitochondria look to have a very different internal structure and can also have a radically different external shape, but inside they do share some similarities. The internal structure of bacteria is very simple, it contains no membrane bound organelles, but instead it contains a nucleoid which is the central part of the cell and it is where the DNA is generally confined to. Ribosomes are present in the cytoplasm of the bacteria as well as storage granules. All bacteria have a plasma membrane, most also have a cell wall and while some have a capsule, others do not (1). Some bacteria also have flagella which are tiny whip-like structures often located at one end of the cell. Although they vary in size greatly, common bacteria such as Escherichia coli are about 2ÃŽ ¼m in length, when comparing this to mitochondria they are very similar in length but like bacteria, the shapes and sizes of mitochondria vary significantly depending on what species or cell they are found in (2). Mitochondria are located in the cytoplasm of both animal and plant cells; they are cylindrical structures that consist of an outer membrane, inner membrane and matrix. Like bacteria, mitochondria also have their own circular DNA genome which is separate from the nucleus of the cell which is located in the matrix. The membrane of the mitochondria is also very similar to the membrane found around the bacteria; it is double layered and is made up from lipids, just like a prokaryotes membrane. This is interesting as it shows no similarities with a eukaryotic cells cytoplasm, but instead it is very similar to the composition of a bacterial membrane. The inner folds of the mitochondrial membrane, cristae, are very similar to mesosomes found in bacteria. Mitochondria also contain ribosomes similar to those found in bacteria; this will be explained further in the next section. Function The main function of bacteria, like any organism, is to reproduce, and while mitochondrias main function is to produce energy in the form of ATP it also needs to reproduce. Mitochondria are formed by a process very similar to binary fission, the method by which bacteria divide. When a bacterium reaches a certain size, it splits down the middle to create two organisms. In a mitochondrion the nucleus signals the cell to produce more organelles, but only the mitochondria actually replicate themselves while other organelles have to be made up from substances present within the cell. There is an electron transport chain found in both the plasma membrane around a prokaryote as well as in the membrane around the mitochondria but it is absent in membrane of eukaryotic cells. Proteins are required in a cell to perform all functions and all synthesis of these proteins takes place in ribosome; these ribosomes are present throughout the cell but mitochondria have their own ribosomes to produce the proteins they need. Chemical and microscopic analysis shows how the structures of mitochondrial and bacterial ribosomes share more similarities with each other than with ribosomes in eukaryotic cells. Ribosomes found in the cytoplasm of eukaryotic cells are 80S in size while ribosomes found in bacteria and mitochondria are 70S in size (3). One experiment carried out by Margulis showed that the protein synthesis of both mitochondria and bacteria are sensitive to erythromycin and chloramphenicol and insensitive to cyclohexamide and emetine whilst cytoribosomal protein synthesis is insensitive to erythromycin and chloramphenicol and is usually sensitive to cyclohexamide and emetine, suggesting that mitochondrial ribosomes are different from those found in the cytoplas m of eukaryotic cells, and are similar to those found in bacteria. This experiment among other structural and functional similarities lead to Margulis to formulate the theory of endosymbiosis. Endosymbiosis The theory of endosymbiosis had been around before the evidence published by Lynn Margulis, but it was her work that made it a widely accepted theory among biologists. Included in her hypothesis was the thought that mitochondria are the result of endocytosis of aerobic bacteria. This would explain the similarities between mitochondria and bacteria, and why mitochondria differ from what would be expected from a typical eukaryotic organelle. The theory purposes that a proto-eukaryotic cell ingested an aerobic bacterium but it failed to digest it. The aerobic cell then thrived due to the cells cytoplasm being full of partially digested food molecules, and some of the ATP may have leaked into the cells cytoplasm. This occurred around a time where the concentration of oxygen in the atmosphere was increasing and aerobic respiration was advantageous to survive (3). An increase in ATP must have caused a growth advantage to the proto-eukaryote, enabling it to dominate over other cells that la cked cell walls and endosymbionts. The endosymbiont, originally the aerobic bacterium, eventually became dependent on the host for both protection and nutrients, meaning there was little need for genes involved in these processes. On the other hand, due to the endosymbiont only being permitted to remain if it continued to capture and store energy, there was a strong selective pressure to retain the genes involved in energy capture and storage. Eventually genes whose products were of no use to the host eroded and were ultimately lost. Finally as the genome reduction continued, the endosymbiont evolved into an energy-providing organelle. However, some more recent research suggests that the endosymbiont may have been an anaerobic bacterium with a fermentative metabolism (4). The bacterium that was originally engulfed is believed to have evolved into a mitochondrion that enabled the evolution of larger organisms. The endosymbiotic theory is well supported, although there are many different variations of it there is strong evidence that suggests mitochondria did originate from bacteria. The similarities in the previous sections are all evidence pointing towards endosymbiosis and this theory explains why bacteria and mitochondria have much in common, and why the mitochondrias function and structure often defies what would be expected from a eukaryotic organelle. Conclusion The similarities between bacteria and mitochondria are easy to see despite belonging to different domains. When a mitochondrion is looked at in detail there are obvious differences to a eukaryotic cell and other organelles present in the eukaryotic cytoplasm, the biggest of these is perhaps the presence of mitochondrial DNA, but there are similarities in many other aspects of a mitochondrion. Their primary functions may be different but bacteria and mitochondria still share process such as binary fission. All this evidence leads to the endosymbiotic theory which offers an explanation for these similarities, although many parts of it are still being debated. This theory allows us to understand how single cell organisms developed into the vast array of complex organisms that are present 3.5 billion years after the first bacteria are thought to have existed.

Psychiatric Nursing Essay

Psychiatric treatment or psychological welfare treatment refers to the field of treatment that is concerned with individuals of each and every age with psychological sickness or psychological suffering, like; bipolar disorder, schizophrenia, despair, dementia or neurosis. However, professionals in this field are given extra teaching in mental treatment, establishing a beneficial coalition that is based on challenging conduct, and the management of psychiatric treatment. The following are some issues facing BC psychiatric nursing; the issue of prisoners, chronic illness, gender, old age and child trauma. Others include; healing choice creation and treatment involvement; medicinal healing and treatment responsibility; nurse and customer verdict creation and crisis resolving; verdict approaches; position clash and position uncertainty. Prisoners Correctional psychological welfare program mainly focuses on suicide avoidance, recognition and healing of the psychologically sick, and continuity of psychiatric healing. The psychiatric professional takes part in an essential function in every one of these plan. The psychiatric professional’s responsibility in a correctional situation is exclusive. This is because the nurse might operate like a staff nurse on an inpatient element giving psychiatric treatment care to prisoners on a given unit or proceed as an outpatient nurse, giving assessments, therapy, or disaster involvement to prisoners in the universal inhabitants. Programs differ in size and range of services in quantity to the inhabitants of the region prison, financial support, and court go-ahead. For instance, a big region prison could give inpatient healing on an inpatient element inside the prison or through an agreement by a psychiatric hospital. Smaller region locks up classically agreement their sensitive services with a local psychiatric hospital. Outpatient-rank services are more often than not given twenty four hours every day in a bigger confinement, whereas minor prisons could give services merely on the day transfer. A minor prison can hire psychological welfare nurses on a part-time basis or none. Countries time and again choose particular jails inside their jail arrangements to give sensitive psychiatric concern or employ sanatorium surroundings inside every jail to become constant and take care of intensely psychologically unwell prisoners. A particular inpatient element in a prison could be a set of cells particularly selected to reside psychiatric patients. Depending on the condition, the region psychological health sector of psychological health services may select or certify the elements for sensitive concern. The elements can be simply confined or empirical accommodation for psychological health patients getting services, apart from an inpatient rank of concern (Achenbach & Edelbrock, 1981, p. 281). Chronic illness Treatment dwellings: since individuals who are psychologically unwell at times require lasting therapeutic concern, at times when a treatment residence may be essential. Nevertheless, several treatment dwellings are not set to effectively tackle psychological health concern matters. However, while choosing a treatment dwelling for a cherished individual, make sure that it concentrates on attending to those with persistent psychological sickness. Housing Care services: majority of individuals with persistent psychological sickness obtain the correct rank of concern in inhabited care services. Normally, they give twenty hour recruitment, space and panel, and support with prescription and preparing psychological welfare care arrangements. Grown-up Care services: the services are additionally household oriented than housing care services. However; usually give similar level of concern. They are additionally suitable for individuals whose circumstances are constant. Grown-up care services are not locked, as well as a number them do not give twenty hour employment. However, household Care dwellings: location is more of a distinctive house in that it provides to a larger extent lesser amount of inhabitants and is not normally organized twenty four hours a day. Unluckily, lots of funding for those with persistent psychological sickness will cover this rank of attention, yet people might require the services of a grown-up attention. Supported existing elements: A supported dwelling element, as its name entails, is most suitable for those individuals who are high performing and constant. With supported livelihood, there is less staff control and inhabitants normally exist in apartments are be given services like food, laundry, and medicinal management. Supported livelihood can also be a link to autonomous dwelling, in that if an individual fruitfully contributes in supported existence yearly, one can be capable of changing to a customary residence. Psychiatric elements: they are either supported in or united with sickbays. A single category of psychiatric element focuses in temporary sensitive concern, nearly when an individual is a threat to him or herself, or others. The aim of this circumstance is to stabilize the person and relocate herself or himself to an additional type of competence. Another form of psychiatric component is the one that is united with a state sickbay, and is frequently a protected capacity for those who need long lasting attention. Sexual characteristics. The stand for deed pressurizes that women are allowed to enjoy the uppermost achievable set of bodily and psychological fitness. Creating a relationship between women’s individual existence and welfare and their responsibilities in the society, the stand affirms that the pleasure of this right is very important to their existence and welfare and their capacity to take part in every area of communal and personal living. The global meeting on residents and progress accepted that reproductive privileges hold confident individual civil liberties that are already familiar in state rules, global individual human rights credentials and other agreement credentials. omprise of general announcement of individual human rights and its 2 original executive agreements, the global agreement on financial, communal and civilized privileges , which refers to the right of everybody to the pleasure of the uppermost possible set of material and psychological fitness, and the global agreement on public and Political civil liberties , which consists of an amount of welfare related individual civil liberties, such like the freedom of existence, the right to freedom and safety of the individual and the freedom to solitude (Ahmann, 1994, p. 4). However, constructing on the global talks on people and growth and its Program of deed, the policy for an act affirms that the individual privileges of women consist of their freedom to be in charge and come to a decision without restraint and sensibly on issues linked to their sexuality, as well as sexual and reproductive wellbeing, liberated of intimidation, favoritism and hostility. Hard work has improved to regard physical condition in the support of individual civil rights. When physical situation is measured as an individual right, and not simply a societal excellent, civil liberties and tasks require to be explained consequently. The connection between women’s individual civil liberties and welfare has been initiated through the joint hard work of women’s welfare and women’s privileges supporters. In concentration and overlook of women’s welfare matters, especially reproductive fitness, in the lawmaking and modifying frameworks of nations, have been accepted as an element of an organized favoritism besides women. Old age Psychiatric ill health is a severe physical condition trouble in old people. Mental ill health is linked to poorer health result in addition to enlarged expenses intended for aged patients with recurring medical situation that are very much common in old age, for instance hip cracks, cancer and heart attack. In older people, the interaction of synchronized medical conditions and psychiatric and results to overwhelming disability and transience, creating exceptional therapies that have largely been neglected by the health care system. The largest part destructive essentials of unfairness in America include; the stigmatization of the very aged and the mentally ill. These prejudiced burdens are apparent in a lack of investigate, and insufficient access to suitable services and healing. Psychological fitness facilities based in the community level mostly lack appropriate services for the aged and personnel qualified to tackle medical needs. Investigation has verified that adults are more probable to be given suitable psychological wellbeing attention, and to contain improved medical results, whilst psychological fitness services are incorporated with universal health check care in the chief care background. Several schedules with numerous suppliers in numerous surroundings add up to an intolerable weight to individuals for whom persistent sickness and bodily disability are severe restraints. In addition, fewer stigmas related to getting psychiatric attention when they are a fundamental element of universal medicinal concern. Mental health in practice ought to have life-altering outcome. For example, sign of pain and despair can be treated even in older age, even in the presence of severe disease and disability, and also for those who stay in the nursing homes. However our health system has done little to convert this systematic information into clinical practice. The persistent approach among clinicians, patients and the society in general believes that being old implies living with pain and despair. For this reason the older people don’t receive the treatment they deserve. Further than the failure to recognize, diagnose, and initiate treatment, recent the next generation of troubles facing older people with mental ill health is unfortunate quality of care follow up. In most studies elderly nursing home people who receive antidepressant medication care, just about half of them continue to have sign, yet they don’t need treatment changes to make sure that they get well. Infant trauma Expert qualified in the nursing and medical treatment of child sexual oppression are often the first specialists taking care of the child and assess needs and can also bare witnesses in court trials. The prime intention of any medical involvement for the child is carryout a physical assessment, a psychological estimate and legal proof for potential proceedings. Children who have sexually been subjugated get to the interest of nurses and physicians in a multiplicity of ways. The child may be attended to by a private doctor or a nurse practitioner in the urgent situation department of a hospital. Big town repeatedly have selected hospitals that attend to child victims of sexual harassments and abuse with qualified, skilled doctors, social workers and nurses. Family may be asked to take a trip some far distance so as to have their child observed and evaluated at one of the dedicated healthcare facilities. A child may also be attended to in the healthcare system through the community or public health, school nurse and outpatient services. Alleged cases of child sexual abuse may moreover be seen first by law enforcement officer who will after that refers the child to the suitable healthcare for assessment. On arrival at the healthcare clinic, the child’s parents will be asked to present their complains. The health evaluation of the sexually assaulted child has a number of steps which include taking of history, Interviewing the child, physical test, and psychological assessment. History taking is the initial step in the health evaluation. The information about the growth and development of the child is provided by the parents (Ahia, 1997, p. 36). The researcher will generally commence with questions that examines the child’s Knowledge about family members, familiar events, and personal data. For example, the interviewer may want to establish that the child knows his or her name, date of birth, and grade in school. From these responses, the researcher will decide the finest way for the child to talk about the assault. The realistic Interviewing practice is the third step where the interviewer remains objective and neutral in inquiring the child. The questioning should not be threatening to the child or the parents. Researcher should stay as unbiased and goal as probable in enquiring the child is the second step which varies depending on the age of the child and the level of development. The interviewer will evaluate the child’s verbal communication skills and mental and poignant development. The research will usually commence with inquiries that examine the child’s knowledge about family members, familiar events, and personal data. For example, the interviewer may want to establish that the child knows his or her name, date of birth, and grade in school. From these responses, the researcher will decide the finest way for the child to talk about the assault. Certain people should not be allowed in the research area. For instance, asking a child questions in front of the alleged offender or interviewing a child in a room full of adult strangers is stressful and will limit dialogue with the child. A parent or guardian in the room may be reassuring for the child and, after the child becomes comfortable with the interviewer, the parent is often able to exit quietly. A suitable tone should be situated in the research from the beginning. A proper introduction of everyone present is necessary, as is a coherent, understandable explanation of why the interview is taking place. The researcher should request for, not take for granted, teamwork, and assure the child that the interview will be as comfortable as possible. The young person must be given authorization to inquire queries concerning everything that is not understood. A victorious research is one in which the young person is provided with some measure of control, even if it simply means a choice of a toy. Many children who have been sexually harassed have lost an intelligence of power and control over their own bodies and behavior and have learned to be overly compliant and passive. The researcher should set up a universal relationship with the young person before trying to obtain specific information about the victimization. It is over and over again is important to begin by playing with dolls or requesting the child to draw a picture. It is through this early stage that it is most suitable to ask the child’s full name. The researcher may require the young person to write it down on the drawing paper. The young person should not be forced to open up right away; instead the interviewer should try to determine what is preventing the child from talking about the abuse. For instance, a parent may be angry and confused because a child is making allegations about a boyfriend. That parent may have intimidated the child prior to the interview or may have threatened the child with removal from the home. It may be essential for the parent to depart the area organized for the interviewer to obtain certain information. Conclusion Psychiatric nursing face cultural and contextual issues in dealing with psychological sicknesses which may include infant disturbances, gender, issues with the inmates, sexual characteristics, chronic illness and old age . The researcher should set up a universal relationship with the different groups so as to come up with proper results as they assist the clients.

Jeremy Benthams Utilitarianism is a Convincing Method for...

Utilitarianism has been recognized as a convincing method regarding normative ethics, utilitarianism wasn’t fully expressed until the 19th century. Jeremy Bentham and John Stuart Mill, acknowledged the good with pleasure. Both of the philosophers believed we ought to make the most of the good, everyones happiness is the same no matter what type of happiness it is. When one fulfills their good, it doesn’t mean one’s individual good doesn’t count more when compared to someone else’s good. Jeremy Bentham was born on February 15th, 1748 in Houndsditch, London and died on June 6th 1832. He was a British philosopher who founded modern utilitarianism. Anglo- American philosophy of law was very important to Bentham, he was the leading philosopher of this law and he also influenced the idea of human well-being. Bentham was a strong advocator for the community and their people when it came to economic liberty, freedom of express, equal rights especially for women, discrimination of homosexuals and their acts, separation of church and state and a right to file for divorce. He made an effort to eliminate the death penalty, to stop bondage and to eliminate physical punishment which included children. One of them main reason Jeremy Bentham was very well-known was because was an advocator for animal rights (Sweet, 1969). Bentham attended Westminster School located in Simsbury, Connecticut, he went off to The Queens College, Oxford, got his Bachelors degree in 1763 and three

Walt Disney Company - 1069 Words

Effects of Leadership Style In The Walt Disney Company if there was an authoritarian leader it would affect group communication immensely because the employees need to be creative and because authoritarian leaders â€Å"make decisions, give the orders, and generally control all activities† (Beebe Masterson, 2009, P. 290) this does not allow creative communication. When a leader dictates techniques to a group it does not allow constructive communication, and ideal sharing, and this would not be good for The Walt Disney Company. In The Walt Disney Company if there was a democratic leader, although this would be better for the company than authoritarian, it would affect group communication greatly because the leader still directs the†¦show more content†¦The role of communication for self-efficacy theory will mean many things to different member of the group. It is important that the group members communicate positively to all group members to help boast self-confidence . This will help the group to be more productive and help each member of the group to have an equal voice. The group will need to communicate to one another that each member has the belief that the group is capable of doing the task set in front of the group. Commitment of Workforce The commitment of the workforce at The Walt Disney Company is immense. The workforces at The Walt Disney Company are committed to The Walt Disney Company mission of making their customers have a magical experience. The workforce is committed to The Walt Disney Company vision of future idea through communication. The Walt Disney Company workforce is committed to their relationship to communicate with one another. The workforce as well as The Walt Disney Company has a good line of communication. The workforce of The Walt Disney Company can communicate ideas within the organization and the workforce ideas are welcomed. This allows the relationship between the workforces of The Walt Disney Company to know they are important and therefore brings about good communication. Conclusion In conclusion, The Walt Disney Company has different leadership styles that affect the organization. The Walt Disney Company has many sources of power that they use wisely. The WaltShow MoreRelatedWalt Disney Company1730 Words   |  7 PagesThe Walt Disney Company is a diversified international family entertainment and media enterprise business. They have five business segments which are media network, parks and resorts, studio entertainment, consumer products and interactive media. Disney Media Network consists of broadcast, cable, radio, publishing and digital businesses within the Disney/ABC Television Group and ESPN, Inc. Walt Disney Parks and Resorts is comprised of family oriented parks and resorts all around the world. 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