Answer to Question 1
Selenium is one of the body's antioxidant nutrients, working primarily as a part of proteinsmost notably, the glutathione peroxidase enzymes. Glutathione peroxidase and vitamin E work in tandem. Glutathione peroxidase prevents free-radical formation, thus blocking the chain reaction before it begins; if free radicals do form and a chain reaction starts, vitamin E stops it.
Answer to Question 2
Two rare genetic disorders affect copper status in opposite directions. In Menkes disease, the intestinal cells absorb copper, but cannot release it into circulation, causing a life-threatening deficiency. Treatment involves giving copper intravenously. In Wilson's disease, copper accumulates in the liver and brain, creating a life-threatening toxicity. Wilson's disease can be controlled by reducing copper intake, using chelating agents such as penicillamine, and taking zinc supplements, which interfere with copper absorption.
The enhancement effect observed by Emerson.
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Polar Nature of Water Molecules
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Healthy Eating around the World Many countries
Penicillin saved the lives of many soldiers in World War II