Define about the metabolism of selenium compounds, Biology

Assignment Help:

Define about the Metabolism of Selenium compounds?

Selenium compounds' are generally very efficiently absorbed by humans and selenium absorption does not appear to be' under homeostatic control selenium is mainly absorbed from the duodenum. Less absorption occurs in the jejunum and ileum. Inorganic forms of selenium (mainly selenate) are passively transported whereas organic forms are actively transported. Almost 5040% of dietary selenium is absorbed, with efficiency being higher for organic forms, as compared to inorganic.

Among the organic forms, selenomethionine is better absorbed than selenocysteine. Among the inorganic forms, selenales are better absorbed than selenites. For example, absorption of the selenite form of selenium is greater than 80% whereas that of selenium as selenomethionine or as selenate may be greater than 90%. In addition, some dietary factors appear to influence the absorption of the element. Phytates and heavy metals, such as mercury through chelation and precipitation, hinder selenium absorption. Vitamins C, A and E, as well as, glutathione enhance the absorption.


Related Discussions:- Define about the metabolism of selenium compounds

Hydrocarbons do not readily evaporate at room temperature, The fact that so...

The fact that some pure solutions of hydrocarbons do not readily evaporate at room temperature is a result of- Select one: a. London dispersion forces. b. The hydrophobic

Role of glucose-6-phosphate dehydrogenase - gene expression, Define Role of...

Define Role of Glucose-6-phosphate dehydrogenase - Gene Expression? Glucose-6-phosphate dehydrogenase (G6PD) is another enzyme involved in lipogenesis that is regulated by diet

Microorganisms, what are the disadvantages of protozoa?

what are the disadvantages of protozoa?

Explain glycogen storage diseases, Glycogen Storage Diseases Glycogen  ...

Glycogen Storage Diseases Glycogen  storage diseases are caused by  genetic defects that result  in  deficiencies in  certain enzymes of  glycogen metabolism. These deficiencie

Acid rain, The Phenomenon of acid rain was first introduced by Rober Angus ...

The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn

Extractive use of biodiversity, Q. Extractive use of biodiversity? This...

Q. Extractive use of biodiversity? This includes direct use such as harvesting of wild plant species for use as food, fuel, fodder, fibre, shelter or medicine and hunting anima

Standard invert sugar solution, Q. Standard invert sugar solution? Rea...

Q. Standard invert sugar solution? Reagents Required 1) Standard invert sugar solution: Weigh accurately 0.985 g of sucrose and dissolve in 500 ml of water. Add 2 ml of

Antimicrobial prophylaxis - controversial, Antimicrobial Prophylaxis - Cont...

Antimicrobial Prophylaxis - Controversial The need for prophylaxis in breast surgery, herniorraphy and other "clean" surgical procedures has been controversial. Medical Letter

Explain properties related to protein-protein interactions, Explain Propert...

Explain Properties related to protein-protein interactions? Properties related to protein-protein interactions include dough formation, one of the important functional properti

Bacterial growth, 1. Given a log phase bacterial culture with 1 x 106 cells...

1. Given a log phase bacterial culture with 1 x 106 cells per ml and a generation time of 20 minutes, how long does it take the culture to reach a density of 6.4 ? 107 cells per ml

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd