Essay --

Introduction The endomembrane system is the membrane surrounding the organelle within the cytoplasm. Each membrane bound organelle is functionally and structurally compartmentalized within cell. The presence of this system is the fundamental difference between prokaryotes and eukaryotes (Raven, Johnson, 2001). Each of membranes is unique and different in relation to molecular compositions and its structure which continue to keep changing in cell’s life time (Reece et al. 2011). This essay is focus on the comparisons of two endomembrane systems, Golgi apparatus and plasma membrane in terms of their structures and functions. Additionally, the consequences to the cell if each of these membranes lost their integrity will be explained. Structure The structure of Golgi apparatus is composed of semi-circular and flattened stacks of membrane-bound disc known as cisternae and these stacks of cisternae divide into three regions, cis face, medial and trans face. Cis-face is near endoplasmic reticulum and it mainly receives (or fuse with) the vesicles containing products from ER and synthesize and process to send them off through trans face which is located near plasma membrane and medial Golgi apparatus is between them. Plasma membrane is also a biological membrane that forms selective barrier between the surrounding environment and cell and it consists of phospholipid bilayer with various proteins either embedded or attached to it (Reece et al. 2011). Lipid composition Though all endomembrane system have simple basic structure which is double layer of phospholipid (hydrophobic side inward and hydrophilic side outward) with proteins, the composition of lipids and types of proteins may differ due to their characteristic functions. (Campbel... ...yers and have various different functions. Although their compositions that consists of two membranes have some differences, the fact that cis sides are more ER-like and those on the trans side are more plasma membrane-like has enable us to speculate couple of theories about the origin of Golgi apparatus. They both are engaged in secretory pathway at different stages and failure of the membrane integrity affects greatly on the traffic of cell which leads to number of diseases. Despite many researches and knowledge discovered in plasma membrane, there were only few things known about Golgi apparatus. This is mainly due to the difficulties of purifying the concentrated organelle from intact cells (Sean Murno, 1998). But it still has great potentials and is prominent in medical field. Therefore more detail examination and investigation in depth are expected in future.

Food security Essay

The role of urban agriculture in food security and healthy nutrition is probably the most important asset. Production of food in cities is in many cases a response of the urban poor to inadequate, unreliable and irregular access to food, and the lack of purchasing power. Urban agriculture, to a large extent, complements rural agriculture and increases the efficiency of the national food system in that it provides products that rural agriculture cannot supply easily. For instance perishable products that require rapid delivery upon harvest can be produced in cities where facilities are readily available. Environmental Urban agriculture has helped a lot in maintaining the environment that has been depleted so much. This can happen in several ways. For instance farmers use waste water for irrigational purposes in their farms. However farmers need to be trained in self protection during handling of the waste water, proper crop selection and adequate irrigation methods, among many other things. Farming in urban areas means rehabilitating the already depleted lands in the urban areas. By doing this, the farmers are able to help save the environment that has been wasted by pollution (DeWalt, 1985). 4. Case study, Washington D. C Urban agriculture was part of an historical welfare system during the 18th and 19th centuries in Washington D. C. Urban residents had access to areas of urban agriculture land that was distributed to meet the needs of urban inhabitants and all the people who lived in Washington D. C. Individuals who lived in and around the city had adequate land to practice urban agriculture (Ross, 2007). The history of urban agriculture in Washington was mainly meant to help reduce the number of poverty cases in the city (Ross, 2003). The growth and development of allowance gardens in Washington during the 20th century was in similar ways objectively aiming at supporting urban working class families and individuals. The problem today aims in the same direction, where growth and development of urban agriculture in Washington, more especially in low income areas, relates to problems of food quality, social welfare and public health. Nevertheless, urban agriculture in Washington today is made up of an increasing urban demand for organic local food production, particularly among the urban middle societies. Historically in Washington, a small number of upper class urban residents had access to very large areas of land (Ross, 2000). This group was not producing for self-support in first hand, but had the requirements of selling part of their locally produced harvest, as food was difficult to transport. Urban agriculture in Washington has thus had many functions of social welfare and commercial activity. Interesting historical lessons and comparisons can be made as we discuss the function and role of urban agriculture in Washington today (Ross, 1978). 5. Challenges and implementation Urban agriculture has faced a lot of challenges despite its many positive impacts. The use of waste water for irrigation without careful treatment and monitoring can result in the spread of diseases among the population. This has been a challenge to the urban agriculture and it has reduced the attitude of the urban residents towards the food products from urban farmers. Cultivation of food crops on contaminated land can cause health hazards for the consumers (Bell, 1998). This has led to decrease in demand of the urban agricultural products and it is the whole concept that lacks the benefits that it deserves. The cultivation of food crops and the rearing of animals along road sides facilitate the distribution of products to local markets. However, this poses some health risks since it exposes foods to a number of pollutants such as car emissions. It is evident that urbanization and agriculture are very incompatible. There has been stiff competition for the urban agriculture, for labor and resources, and it is unfortunate most individuals prefer to work in an industry or firms than to work in farms. This has led to poor labor as a factor of production and what results is the poor output in the food production. The practice of urban agriculture has been criticized by those who believe in industrial food production. The critics argue that food can be produced at larger volumes and perfect quality in a more efficient and sustainable way. This criticism has led to many people lacking trust in the urban agricultural products (Bell, 1998). The only mean of implementing the methods of urban agriculture will be through educating the public about the importance of embracing the culture. Addressing issues on genetic applications in food production will be important in acceptance of the novel technologies by the public. The companies applying advanced technologies in agriculture should not hide anything from the farmers (Clark, 1999).Water treatments systems should be improved to ensure that water used for agricultural food production is safe for human health. Reference: Amin, S. (2002). Africa: Living on the Fringe. Monthly Review (March), pp. 41-50. Retrieved May 4, 2010 from, http://polisci. osu. edu/faculty/mcooper/ps597readings/Amin. pdf Bell, J. (1998). A Greener Than Green Revolution? Seedling (Newsletter of GRAIN Retrieved May 3, 2010 from, http://www. grain. org/publications/dec982-en. cfm Bruno, K. (1992). The Corporate capture of the Earth Summit. Retrieved May 3, 2010 from http://multinationalmonitor. org/hyper/issues/1992/07/mm0792 07. html Clark, E. (1999). Ten Reasons Why Farmers Should Think Twice Before Growing GE Crops. Retrieved May 4, 2010 from, http://www. plant. uoguelph. ca/research/homepages/eclark/10reasons. htm DeWalt, B. (1985). Mexico’s Second Green Revolution: Food for Feed. Mexican Studies / Estudios Mexicanos, 1(1):29-60. FAO. (n. d). Overall strategic framework. Retrieved May 4, 2010, from http://www. fao. org/docrep/X3550e/x3550e03. htm Feder, E. (1970). Counterreform. In Rodolfo Stavenhagen, Agrarian Problems and Peasant Movements in Latin America. Garden City, NY: Doubleday. Retrieved May 4, 2010 from, http://www. ditext. com/feder/counterreform. html Langevin, M & Rosset, P. (1997). Land Reform from Below: The Landless Workers Movement in Brazil. Retrieved May 4, 2010 from, http://www. mstbrazil. org/rosset. html Martine, G. , Guzman, J. M. , & Schensul, D. (2008). The Growing Food Crisis: Demographic Perspectives and Conditioners. Retrieved May 4th, 2010 from http://km. fao. org/fileadmin/user_upload/fsn/docs/UNFPAFoodCrisis_Demographics Nov19-versionMarch20. pdf Neondo, H. (2003). Kenya-Experts call for Urba

Depression During Pregnancy Nursing Role, Interventions,...

Introduction Pregnant women are vulnerable to depression because of major changes in estrogen and progesterone levels as well as changes in the brain which produce significant physical and psychological impacts (Stewart, 2011). Depression during pregnancy can affect not only the mother but the unborn child and other children. Caring for women who are depressed during pregnancy is in many respects different from other types of caring. Caring in this situation is demanding and truly involves the intention to care. The women are diverse but most of them live in poverty, without social support, and many do not want the child (Sable Washington, 2007). The nursing role is best summarized as a moral ideal because of the level of acceptance†¦show more content†¦Stress or perinatal loss will always cause a high level of anxiety, and stress will end in depression (Cote-Arsenault, 2007). If depression is not managed it easily leads to poor nutrition, insomnia and lack of exercise as well as substa nce abuse. Among other problems are poor neonatal outcomes, poor neuro-behavioral development for the fetus, and a high risk for postpartum depression (Suppaseemanont, 2006). When depression occurs, it can well endure for the reminder of the pregnancy and will result in extreme stress as well as multiple anxieties. All serious depression must be managed to prevent damaging effects to mother and fetus. Role of Nursing Assessment According to Buck (2009), the children as well as the partner need to be assessed for the impact of depression. If the depression is very serious, further assessment may be needed. In terms of screening and identification it is recommended in clinical practice that during the woman’s first visit nurses and other health care providers need to ask questions relating to mental health. Typical questions include asking about a history of mental illness or depression during pregnancy, whether the woman feels little interest in things, and whether she has been feeling down or hopeless lately. If there is a positive response to any question, then the woman should be asked if sheShow MoreRelatedAnnotated Bibliography On Postpartum Depression1518 Words   |  7 Pages Annotated Bibliography Borra, C., Iacovou, M., Sevilla, A. (2015). New Evidence on Breastfeeding and Postpartum Depression: The Importance of Understanding Women s Intentions. Maternal Child Health Journal, 19(4), 897-907. doi:10.1007/s10995-014-1591-z This journal article did research about the cause and effect of breastfeeding on women who have postpartum depression (PPD). 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