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Author Question: Discuss the essential nature of selenium. Where and why are deficiencies observed in the world? ... (Read 23 times)

Beheh

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on: Aug 20, 2018
Discuss the essential nature of selenium. Where and why are deficiencies observed in the world?
 
  What will be an ideal response?

Question 2

Discuss the role of copper in the disorders Menkes disease and Wilson's disease.
 
  What will be an ideal response?


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Eunice618

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Reply #1 on: Aug 20, 2018
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.


Beheh

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Reply 2 on: Aug 20, 2018
Excellent

shewald78

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Reply 3 on: Yesterday
Wow, this really help

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