Solo disponible en BuenasTareas
  • Páginas : 77 (19159 palabras )
  • Descarga(s) : 0
  • Publicado : 21 de agosto de 2012
Leer documento completo
Vista previa del texto

3RD SEMESTER SED By BC. Tania De La Torre


Unit I

3 Making Predictions – Reading Comprehension Virus-Induced Obesity in Humans
Recognizing that a particular adenovirus can cause obesity changes perceptions about this condition and strategies for dealing with it Richard L. Atkinson

In 1998, offıcials of the World Health Organization (WHO) declared a globalepidemic of obesity, recognizing the steady rise in its prevalence in both developed and developing countries since about 1980. Obesity, defıned as a body mass index (BMI in kg/m2) value of at least 30, doubled among US adults from 1980 to 2000, and tripled in children in the United States and other countries, including England, China, Thailand, and Korea. In women, the prevalence of obesity inAlbania, Jordan, Panama, Paraguay, and South Africa is equal to or greater than that in the United States. Although some experts point to increased food intake, including of fast foods, and decreased activity, these factors do not explain the rise of obesity in developing countries. Instead, this abrupt shift in the global prevalence of obesity appears to fıt the pattern of an infectious epidemic.Several events during the late 1970s appear to be consistent with this hypothesis. For example, soon after commercial chicken growers in Mumbai, India, noted increased deaths among their flocks, an Indian microbiologist identifıed an adenovirus, SMAM-1, that was infecting chickens and lowering immune functions, thus enabling other infectious agents to kill a higher percentage of chickens than usual.Moreover, when infected with SMAM-1, chickens developed increased body fat. Subsequent experiments in which chickens were deliberately infected with SMAM-1 reproduced the obesity seen when they were naturally infected. Meanwhile, some humans developed antibodies to this chicken virus. Separately in 1978, scientists isolated adenovirus 36 (Adv36) from humans. Later, analysis revealed that thisvirus has fewer DNA sequences in common with the other approximately 50 human adenoviruses. Moreover, antibodies that recognize Adv36 do not cross-react with more than 40 other human adenoviruses that were tested. These fındings led scientists at the University of Wisconsin to speculate that Adv36 arose from SMAM-1 and that it not only infects humans but also can make them obese. Although not proved,other studies in humans and experiments in animals lend support to this hypothesis.


4 Graphic Organizer - Predicting

Your prediction—What do you think this will be about?

What clues did you use?

Now that you have finished reading, how would you changeyour prediction?





5 Reading Comprehension – Reading Purpose (Propósito de Lectura) Some Purposes for Reading for pleasure or for personal reasons to find general information such as what a book is mostly about to find a specific topic in a book or article to learn subject matter that is required for a class. Source: Reading for Different Purposes: Strategiesfor Reading Different Kinds of Materials | Text 1 Hotel replaces printed Bibles with Kindles By Heather Kelly, CNN updated 1:08 PM EDT, Thu July 5, 2012 |

(CNN) -- Last year, Gideons International distributed more than 84 million printed copies of the Bible around the world to students, hospitals, membersof the military and, of course, hotels, where they are a ubiquitous sight in bedside tables. Starting this month, however, the InterContinental Hotels Group is modernizing that mission at one of its hotels, replacing the paper tomes with electronic versions of the Bible loaded on Kindle e-readers. Each of the 148 rooms at the chain's Hotel Indigo in Newcastle, England, will be outfitted with a...