Sarcodina Case Essay Example for Free

Sarcodina Case Essay Sarcodina, the largest phylum (11,500 living species and 33,000 fossil species) of protozoans). It comprises the amebas and related organisms; which are all solitary cells that move and capture food by means of pseudopods, flowing temporary extensions of the cell. Most sarcodines are free living; others are parasitic. One of these parasites is the causative organism of amebic dysentery. With the exception of chloroplasts, sarcodines are identical to the ameboid members of the phylum Chrysophyta. Sarcodines may reproduce asexually by cell division, often without breakdown of the nuclear envelope that is typical in mitosis, or sexually by meiosis and the production of haploid gametes, followed by fusion of gametes and the formation of zygotes. Sarcodina /Sar ·co ·di ·na/ (-di ´nah) a subphylum of protozoa consisting of organisms that alter their body shape and that move about and acquire food either by means of pseudopodia or by protoplasmic flow without producing discrete pseudopodia. Phylum Sarcodina The sarcodines are a much more familiar group of protists than the mastigophores. The most well-known example of a sarcodine is the famous amoeba. Lacking any rigid structure outside of their cell membrane, sarcodines can freely change their shape and form pseudopodia. Sarcodines can live in both freshwater and marine environments. They can reproduce both asexually and sexually, and they are usually free-living. Like mastigophores, sarcodines use pseudopodia to move and capture food. Although the amoeba is generally thought of as lacking any structure, some have shells, and most other types of sarcodines also have shells. One class of sarcodines, the foraminiferans, possess calcareous shells (they are made of CaCO3). Radiolarians also have shells, but theirs contain silica. While the latter two groups usually live in saltwater environments, the heliozoans live in freshwater. They too can have shells which contain silica. Sarcodines reproduce sexually by syngamy (fusion of two gametes) and asexually by division or budding. In multinucleate forms, cytoplasmic division with distribution of the nuclei occurs. Some sarcodines have flagella during certain stages of their development; in other groups flagellated and unflagellated generations alternate. Sarcodines may be either solitary or colonial. Although some are parasitic on plants or animals, most sarcodines are free-living, feeding on bacteria, algae, other protozoans, or organic debris. The genera are distinguished by the structure of their pseudopodia. See also pseudopodium. Pseudopods or pseudopodia (false feet) are a special group of amoebas able to change their form to be able to move. Pseudopods are one of the three locomotion modes of unicellular organisms (together with flagella and cilia). Pseudopods can also capture prey by phagocytosis. Phagocytosis (from Ancient Greek φÎ ±ÃŽ ³ÃŽ µÃ¡ ¿â€"ÃŽ ½ (phagein) , meaning to devour, ÃŽ ºÃ Ãâ€žÃŽ ¿Ãâ€š, (kytos), meaning cell, and -osis, meaning process) is the cellular process of engulfing solid particles by the cell membrane to form an internal phagosome by phagocytes and protists. Phagocytosis was revealed by Ilya Mechnikov in 1882. Phagocytosis is a specific form of endocytosis involving the vesicular internalization of solids such as bacteria, and is, therefore, distinct from other forms of endocytosis such as the vesicular internalization of various liquids. Phagocytosis is involved in the acquisition of nutrients for some cells, and, in the immune system, it is a major mechanism used to remove pathogens and cell debris. Bacteria, dead tissue cells, and small mineral particles are all examples of objects that may be phagocytosed. eat algae, bacteria,other protozoans,and tiny particle of dead plant. Inside of amoeba is jelly like fluid called cytoplasm.amoeba reproduce by a process called binary fission.amoeba can split in half and make two identical new amoebas.they spend most of their time attached to the plants . sometimes they float freely to the water. The word amoeba comes from a Greek word meaning to change. Other ex; arcella, difflugia, heliozoans, radiolarians, foramineferans.

John Miltons Paradise Lost Essay: Allegory of Sin and Death :: Milton Paradise Lost Essays

Allegory of Sin and Death in Paradise Lost  Ã‚     Ã‚  Ã‚   That Milton's Paradise Lost is unsurpassed--and hardly equaled--in English literature is generally accepted by critics and scholars. Whether it may have serious flaws, however, and what they may be, is less certain, for it is here that opinion varies. Of particular interest to some is the allegory of Sin and Death (II. 648-883). Robert C. Fox wonders that it has not been the subject of much more critical discussion, asking "Is it that Milton's readers are puzzled by this episode and, unable to explain its significance, prefer to pass it over in silence? Or do they regard it as so obvious in meaning that no interpretive remarks are necessary?" ("The Allegory" 354). Whatever the answer to Fox's query, his point is well taken; in a survey of the bibliography of the Modern Language Association from 1950-1980, fewer than twenty references specifically devoted to this allegory can be located, and many of these, rather than pursuing the question of its appropriateness and/or it s importance within the total work, simply investigate its tradition and sources.    Merritt Y. Hughes, in referring to those scholars who have commented on the allegory, writes that "for two centuries critics agreed that the step into pure allegory in Sin and Death was a blemish on the poem and an external incrustation. Recently they have been wondering whether it is not a part of the structural irony of the whole design" (177). It is this latter view on which this paper focuses; the allegory is indeed an integral part of the whole of Paradise Lost, not an error of judgment on Milton's part, as some critics believe. It is defensible on two levels, both in terms of structure and in terms of content.    Since it is the presence of allegorical figures--abstractions--in the epic to which some critics object, it is necessary here to discuss both allegory and epic form. Allegory, according to William Flint Thrall and Addison Hibbard, is defined as "an extended metaphor in which objects and persons in a narrative . . . are equated with meanings that lie outside [it]," uses characters that "are usually personifications of abstract qualities, the action and the setting representative of the relationships among these abstractions. Allegory attempts to evoke a dual interest, one in the events, characters, and setting presented, and the other in the ideas they are intended to convey or the significance they bear" (7-8).

Socioeconomic Profile of Hypothetical Patient

Considering socio economic variable of a patient with diabetes, the priority of the patient should be to participate in healthcare insurance program provided by its employer. The benefit of contributing to such a health plan is cost reduction where patients only pay a deductible or a minimum co–payment. Acquiring such a policy also ensures that a person may also be able to cover family members at significantly less rates than individual private insurance.If the employer doesn’t participate in health insurance program, the only other viable method is to get a private health insurance. Although expansive, the patient will definitely have more choice in selecting the out of network providers and the flexibility of evaluating different plans that provide ample coverage to treat Diabetes. Patients with Diabetes need to keep medical supplies such as test strips, meters and insulin which are mostly covered by the health insurance providers (Health Insurance).Unfortunately, in countries like United States getting a health insurance for diabetic patients is difficult but this should not stop patients from researching other options such as Insurance through employers and getting help from the State. Most States run their own health insurance programs for which a diabetic patient might be eligible. Programs such as COBRA and HIPAA are available in every State. It will be in the best interest of a diabetic patient to consult the American Diabetes Association http://www. diabetes. org which outlines health insurance coverage on a State by State basis.Furthermore, patients can easily get guidelines and education on how to tackle diabetic issues and where to look for information. Payer Type Based on the socio economic conditions of hypothetical patient, it will be in his best interest to enrol in HMO plan. Analysing financial circumstances of the subject, it is evident that he will likely cover his wife and children, who at this stage are not able to enrol in a healthcare plan. In contrast, a PPO plan will likely cost a premium which is not recommended except if it provides assistance to cover diabetic conditions.It should be noticed that most Americans are covered by BlueCross BlueShield, Atena or CIGNA therefore it is important for diabetic patient to compare the coverage of diabetic supplies offered by these companies. Health plans that cover most strips and monitors should be preferred over others. Patients should also be careful while determining whether the diabetic equipment fall under normal prescription or covered under durable equipment supplies (Insurance Coverage). Other conditions such as mail order deliveries and the number of supplies at any one time play an important role in the eventual patient satisfaction with a plan.After evaluating different healthcare programs, Harvard Pilgrim Healthcare, Tufts Associated Health Maintenance Organisation and Health New England may provide the best coverage. Cost & Treatment Comparison Harvard Pilgrim Healthcare program is specifically tailored to meet the requirements of Massachusetts residents. It offers a network of 40,000 pharmacies and access to more than 130 hospitals in the area. The co payment fee is $10 for a visit and $50 for emergency care. The program covers a wide range of drugs and medicines with mail order included.Individuals can include family members for an extra charge. The program offers a diabetes management program with test reminder letters and individual support from a Nurse educator by calling a toll free number (Diabetes Management). For a single person in a family, the cost varies from $350 to $470 based on the socio-economic factors of hypothetical patient. The Tufts Associated Healthcare Maintenance Organisation provides a variety of different HMO plans that are designed to be cost effective.Its Select Network Provider program offers a minimum deductible and covers most outpatient medical care (Health New England). Doctor visits and ot her routine checkups offer affordable co-payment plans. It also offers a Taking Charge Diabetes program for its members that support the doctor-patient partnership to control diabetes and educate on such issues. Cost for individuals starts as low as $324 and climbs up to $450 for HMO select plans. Health New England is also a good choice with plenty of great options.Individuals can enrol in a number of Bronze or Silver health insurance packages which covers a huge number of Drugs and area hospitals (Tufts Health). The benefits are somewhat similar to other two programs whereas its Neighbourhood Health Plan provides a great value for money by charging as low as $265 per month in Bronze Package and $369 in Silver Package. It offers a comprehensive Diabetes Management Program that includes educational material, reminders, and physical as well as virtual grocery store tours to select the perfect sugar free diet. References Diabetes Management. Retrieved March 18, 2009, from Harvard Pilgrim HealthCare Web site: https://www.harvardpilgrim.org/portal/page?_pageid=213,213304&_dad=portal&_schema=PORTAL Health Insurance Information for People with Diabetes. Retrieved March 17, 2009, from American Diabetes Association Web site: http://www.diabetes.org/advocacy-and-legalresources/healthcare/insurance.jsp Health New England Plans. Retrieved March 18, 2009, from Health NE Web site: http://www.healthnewengland.com/PlanSelector/Compare/compare.html Insurance Coverage Overview. Retrieved March 17, 2009, from Diabetes Control for Life Web site: http://diabetescontrolforlife.com/articles/Monitoring-Insurance-Coverage-Overview-200085 Tufts Health Plan is the Right Choice. Retrieved March 18, 2009, from Tufts Health Plan Web site: http://www.tuftshealthplan.com/enrollnow/pdfs/STANDARDCOMP_0408.pdf   

How Stress Affects Health - 987 Words

How Stress Affects Health Many health related issues can arise from being stressed out. Often times, stress can be positive, for example, exercise, or activities such as homework or other difficult tasks (Carlson, Eisenstat, and Ziporyn 2004). Although the tension can be stressful, certain tasks are beneficial to the mind or body, which is why it is positive stress. These activities can be stressful to one individual, but relaxing to another (Carlson, Eisenstat, and Ziporyn 2004). Negative stress can be considered as anything that is not good for the body, such as grieving a death, losing a job, divorce, etcetera (Carlson, Eisenstat, and Ziporyn 2004). Both Positive and negative stress can lead to illness. Stress can cause numerous health issues such as obesity, migraines, and heart disease. â€Å"Several studies have supported the affect regulating model of binge eating, which proposes that individuals engage in maladaptive eating behaviors to cope with negative emotions or stressf ul situations experienced prior to binge eating† (Bello, Yeh, Verpeut, and Walters 1). Often times, stress can lead to binge eating, which over a long period of time, can lead to obesity. This can happen because binge eating is connected to being unaware of how much and what foods are being consumed (Bello, Yeh, Verpeut, and Walters 1). 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