Obama Inaurgural Speech Essay Example | Topics and Well Written Essays - 500 words

Obama Inaurgural Speech - Essay Example Despite all the issues the country has been able to recoup and has been able to fight back all issues successfully (Yahoo News, 2009). The president’s speech focused a lot on how he would work on solving issues which the country is currently facing, however this would be possible only if the citizens took up some responsibility. He also mentions that the success of the country mainly depends on the hard work, honesty, courage and fair play, tolerance and curiosity, loyalty and patriotism. He highlighted the importance of these aspects for the country’s success. He paid a lot of importance to the divided efforts of every individual of the country to work towards fighting all the issues that the country is currently facing, which he felt is an important promise and a price to be paid by every citizen of the country (Yahoo News, 2009). President Barack Obama recognised and highlighted a number of issues that are being faced by the country at present. In the inaugural speech Obama has addressed a number of issues which he plans to resolve. President highlighted the issues of the country moving into a recession and also highlighted the various issues that have been caused due to the irresponsibility of a few people, greed and collective failure of a number of decisions made. He felt that these issues would definitely cause the country to decline to a great extent. Thus to resolve this President has tried and requested the country to understand their responsibilities and to take actions to ensure a united improvement of the country (Yahoo News, 2009). The President also mentioned the issue of conflicts and discord which has been prevalent in the country and has decided to try and solve these issues. The President highlighted that United States of America is a country with a number of different religions and a number of different cultures. Also he aims at improving the economic condition of the country and this he mentioned required responsible spending by

How come immune system does not fight cancer Research Paper

How come immune system does not fight cancer - Research Paper Example cancers arising from the connective tissue are known as sarcomas. They originate from the mesenchymal cells that are present outside the bone marrow. examples of this type of cancer are osteosarcoma, liposarcoma, fibrosarcoma and neurosarcoma. Lymphomas and leukemias arise from hematopoietic cells. Germ cell tumors are those which arise from pluripotent cells froms ovaries or testicles. Classical examples of these cancers are dysgerminoma and seminoma. Blastomas are those that are derived from immature cells or embryonic cells. Hence they are more common in children. Examples of these are neutoblastoma and retinoblastoma (Yarbro, 2011). Pathogenesis of cancer Cancer mainly occurs due to failure of regulation of growth of tissues. This occurs due to alteration of the genes which are involved in the growth and differentiation of cells. There are two categories of genes that can get affected during the process of cancer development. They are oncogenes and tumour supressor genes. Oncogen es cause promotion of cell growth and reproduction. Tumor supressor genes cause inhibition of cell division. Hence triggering of oncogenes and supression of tumor supressor genes contributes to cancer (Yarbro, 2011). Causes of cancer There are several causes for cancer and they depend on the site of origin of cancer. For example, lung cancer is caused because of exposure to tobacco, asbestos and certain pollutants. Skin cancer is caused by exposure to sunlight or due to chronic skin ulcer. In some cancers, the causative agent can be infection like cervical cancer which is caused by human papilloma virus. Human T-cell Leukemia Virus-I, a human retro virus is known to cause adult T-cell leukemia. Leukemia, which is a type of blood cancer is caused by chemicals like Benzene and other aromatic hydrocarbons, some insecticides, hexachlorcyclohexane, phenyl butazone (Shafer, 162), alkylating agents, and a few chem-therapeutic drugs. Certain environmental factors also can lead to cancer. St udies have shown that ionizing radiation causes leukemia in experimental animals. There has been increased incidence of leukemia in the survivors of Japanese bomb explosions and those exposed to occupational radiation. Also, those receiving radiation therapies for various causes including spondylitis may be at increased risk for leukemia. Chromosomal translocations involving the Nucleophosmin gene occur frequently in myeloid and lymphoid cancers. This gene is a multifunctional phosphoprotein to which both tumor-suppressor and oncogenic functions have been attributed. In some cancers, genetic factors play an important role like in breast cancer and leukemias. There are some families with excessive incidence of leukemias. There is high concordance among identical twins if acute leukemia occurs in the first year of life. Also, the incidence of leukemia is high in various congenital genetic disorders like Down's syndrome, Bloom's Syndrome, Klinefelter's syndrome, etc. In chronic granulo cytic leukemia, an abnormality in the chromosome 21 has been detected. This abnormal chromosome is called Philadelphia chromosome (Ph-1) and is characterized by the absence of a part of one of its long arms. Certain pre-existing diseases can lead to cancers. Fanconi anemia is a risk factor for developing acute myelogenous leukemia. Those with myeloblastic syndrome also are at risk for acute myelogenous leukemia. Colonic polyps can lead to colon cancer. Other contributing factors for cancer are