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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
- About Us
Anatomy of an Adrenaline Rush
19 November 1997 8:00 pm
How stress hormones unleash a surge of energy was explained by Earl Sutherland, a biochemist born 82 years ago today. Sutherland found that adrenaline accelerates the breakdown of sugar in the liver to provide quick energy during moments of stress. He later discovered that the hormone stimulates individual cells in two steps. First, it latches onto a receptor on the cell surface. The receptor then triggers the release inside the cell of a second signal: a molecule called cyclic AMP (cAMP). Sutherland then determined that cAMP has a larger role, serving as an intermediary for many hormones regulating metabolism in both simple and complex organisms. For this fundamental breakthrough, he received the Nobel Prize in physiology or medicine in 1971. He died 3 years later.
[Source: Emily McMurray, Ed. Notable Twentieth Century Scientists. Gale Research Inc. ITP. 1995.]