(UNIFESP) Longevity: Habits May Extend Life Only So Much

 By Nicholas Bakalar

August 8, 2011

The eating, drinking and exercise habits of extremely old but healthy people differ little from those of the rest of us, a new study has found. Gerontologists at the Albert Einstein College of Medicine recruited 477 Ashkenazi Jews ages 95 to 112 who were living independently. The researchers took blood samples, did physical examinations and obtained detailed personal and medical histories from each participant. Then they compared them with 1,374 non-Hispanic white adults, ages 65 to 74, from the general population. For both men and women, consumption of alcohol, amount of physical activity and the percentage of people on low-calorie or low-salt diets were almost identical in the two groups.

Long-lived men were less likely to be obese than their younger counterparts, although no less likely to be overweight. The oldest women were more likely to be overweight and less likely to be obese. More men among the oldest were nonsmokers, but smoking habits were not significantly different among the women.

____1_____ that it all depends on genes, and we might as well eat, drink and be merry? No, according to the senior author, Dr. Nir Barzilai, director of the Institute for Aging Research at Albert Einstein College of Medicine. “For most of us who ___2____ genes for longevity,” he said, “if you follow the healthy lifestyle the medical community has put forth, you are ____3_____ to live past 80.”The study was published online last week in The Journal of the American Geriatrics Society.

(www.nytimes.com. Adaptado.) 

Assinale a alternativa que completa corretamente a lacuna 2 do texto.

As variáveis de um experimento de difração de raios X obedecem à seguinte lei:

2dsenᶲ = ƛ

onde ƛ é o comprimento de onda do feixe monocromático de radiação X incidente sobre a amostra, ᶲ é o ângulo no qual se observa interferência de onda construtiva e d é o espaçamento entre as camadas de átomos na amostra.

Ao se incidir raios X de comprimento de onda de 154 pm sobre uma amostra de um metaloide, cuja cela unitária segue a representação da figura abaixo, observa-se interferência construtiva em 13,3°.

De acordo com as tabelas 1 e 2, pode-se afirmar que o metaloide analisado é:

 As células apresentam formas e estruturas diferentes para cada tipo de especialidade celular. Axônio, dendritos e telodendritos são estruturas pertencentes a células do tecido  

Observe a gravura e o mapa abaixo referentes às paisagens naturais africanas:

A vegetação da gravura faz parte da paisagem natural africana. Identifique nas alternativas abaixo aquela que indica corretamente o tipo de vegetação, sua localização no mapa de acordo com a indicação numérica e as características desse tipo de formação:



(ENEM 2010 1ª APLICAÇÃO) THE WEATHER MAN

They say that the British love talking about the weather. For other nationalities this can be a banal and boring subject of conversation, something that people talk about when they have nothing else to say to each other. And yet the weather is a very important part of our lives. That at least southwest of England. Here employees – and computers – supply weather forecasts for much of the world.

Speak Up. Ano XXIII, no 275.

Ao conversar sobre a previsão do tempo, o texto mostra: