Questões de Concurso

By Emily Willingham on August 30, 2018

In 1995 the late actor Christopher Reeve, who most famously played Superman, became paralyzed from the neck down after a horseback-riding accident. The impact from the fall left him with a complete spinal cord injury at the neck, preventing his brain from communicating with anything below it. Cases like Reeve’s are generally considered intractable injuries, absent any way to bridge the gap to restore disrupted communication lines.When Reeve died in 2004 a means of reconnection had yet to be built. Now, 14 years later, researchers have coaxed nerve cells to span the divide of a complete spinal cord injury. Their findings, described August 29 in Nature, are specific to only one kind of nerve cell and much work remains before a means of reconnection reaches patients, but the results make an impression. [...]

Their first effort failed. They tried dampening the activity of a gene called PTEN because the gambit had worked well with a few other types of nonspinal neurons. To their surprise, that strategy did not succeed with the propriospinal cells. They then turned to a set of chemicals that promote nerve cell growth and trigger production of a well-known structural protein called laminin, widely used in tissue engineering as a scaffold. Some of these growth promoters are active in embryonic development, and adults usually do not make them. Previous efforts to coax axons across an injury gap using so-called growth factors alone had come up empty—failures blamed on other inhibitory chemicals getting in the way.

(Disponível em: https://www.scientificamerican.com/article/growth-cocktail-helps-restore-spinal-connections-in-the-most-severe-injuries/, acessado em 02/09/18).

American fast food has certainly affected Korea. You can find American fast food restaurants everywhere and many young people don’t appreciate traditional Korean food anymore. Koreans are now using western ingredients such as ketchup, mayonnaise and butter to cook regular meals. Salad dressing, something we never used before, is also popular now.

The problem is that American companies sell their food along with American culture. Manners in restaurants are not the same before. I can give you two examples of this. Traditionally Koreans don’t use individual plates for eating main dishes. We have always eaten from one bowl, but now some people think that this habit is unsanitary.

Tipping is also new for us. Before, we had never rewarded good service with money, but now we are supposed to give a tip to waiter in some restaurants. I fear our traditional way of doing things will soon be forgotten.

By Jeong Kim, from Korea.

(PLATERO, Luciana & DONNINI, Lívia. All Set, vol. 2, student book. Boston, USA: Thompson Heinle, 2008. Adaptado.)