DDT Article Example | Topics and Well Written Essays - 1000 words - 1

DDT - Article Example However, due to high prevalence and mortality rate associated with malaria, I suggest review of the policy governing the use of DDT and the insecticide be reintroduced to prevent high malaria outbreak in African continent. To make this decision, it is important to have toxicological data on the effects of the insecticide on human health and the environment. Concerns about toxicity of DDT on human health are based on the storage of the compound and its metabolites in the human body fat, the occurrence of DDT residues and its radicals in human milk, the potential of causing cancer in addition to fears of interfering with hormones in the body (WHO, 2007). From these concerns, it is important to have toxicological data regarding its effects on various physiological processes in the body. These include effects on respiratory, reproductive and circulatory systems among others. Currently, toxicological data on DDT indicates that exposure to high concentration of the insecticide within half an hour does not cause permanent health effects (CDC, 2010). In addition, the insecticide has low order of severe toxicity when inhaled (CDC, 2010). ATSDR (2002) lists the four phases of disposition of toxic compound in assessment of its toxicity. Absorption of a compound into the body is the first phase, followed by its distribution in the body in the second stage. The third phase entails metabolism or the breakdown of the compound in the body and finally secretion of the chemicals from the body is the fourth and final phase (ATSDR, 2002). DDT enters the body through contact of the chemical with skin and the mouth when swallowed. WHO (2007) notes that the insecticide has marginal severe toxicity on dermal contact but is extremely poisonous when taken orally. The first phase of absorption involves the movement of molecules across membranes.

Extra Credit ANTH Essay Example | Topics and Well Written Essays - 750 words

Extra Credit ANTH - Essay Example The scientists simply study humanity; they tend to figure around how the human race has changed to the current state it is today. Cultural Anthropology is a branch that is concerned with the behavior patterns of the human race. This entails acts of man of clothing, religious activities, and land activities. The cultural branch of anthropology is divided into two, on is ethno linguists, which deals with the study of culture language and ethnomusicologists which is the study of music traditions. Archeology is also another branch of anthropology that deals with the study of society culture. This involves the study of artefacts which reflect the early mans culture and their daily life.Lingustic deals with the study of language. This branch tends to explain how man communicated both verbally or in written form. Physical Anthropology is a branch of anthropology that is concerned with the study of human evolution and the genetics of human race. Anthropologists study everywhere humans and th eir ancestors lived. The scientist through their investigations tend to answer the question ‘why are we what we are’ as biological organisims.The biological changes responsible for bringing humanity to its present state. The ancestral remains in bone form of the human race are called hominids. Anthropologists study the hominids on their physical appearance, intelligence change that makes man distinct from other creatures. The study of the genes in man and how they influenced by the environment. Environmental factors and the effect it has to man, this include climate. The scientists investigate on the reaction of man in relation to the climatic changes. The advantages and the disadvantages of climate on the social and cultural well being of man. The scientist study the human population in relation to climate. The difference of human beings to other creatures in relation to physical anthropology research have been identified. Man is a bipedal creature, he walks on two fee t. The human race has a unique dental structure different from other creaturers.Human beings have a material culture, of which they use objects to manipulate a given environment. According to Anthropologists man has a developed thinking capacity compared to other creatures. Scientists have built a system of ideas to link thoughts explaining the result of an experiment. A fundamental theory on the origin of man was constructed by Charles Darwin. He was given the responsibility of collection, documentation and study of the natural world. Darwin succeeded in coming up with the variations of physical characteristics and their adaptations. He termed adaptation as Natural Selection; this is where the biological characteristics of species boost their survival. In his research he acquired information from scientific subjects which are taxonomy, geology, paleontology, demography and systematics. There were various contributions of scientists in coming up with a theory on evolution.Scientst R obert Hooke was the first in the discovery of cells using a simple microscope. Georges Cuvier discovered the concept of extinction by studying a fish fossil. James Hutton provided evidence is the construction of evolution life span. John Ray discovered the first scientific classification of plants and animals. Thomas Malthus came up with the survival characteristic concept. Carolus Linnaeus came up with a classification system by giving organisms unique names for easy classification. He came up with the taxonomic classification o