Determine the fate of manganese which is absorbed, Biology

Assignment Help:

Determine the fate of manganese which is absorbed?

Let us now study the fate of Mn which is absorbed.

After absorption, Mn is complexed with albumin and transported to the liver, which is the key organ in its metabolism. In the liver, Mn is found in both rapid and slow exchanging pools. The former is the precursor of biliary Mn, which is excreted in the faeces. The latter serves as the source of Mn for the liver and extra hepatic tissues. Mn becomes bound as Mn2 + to a-macroglobulin before traversing the liver. From the liver, some Mn2+ appears to be oxidized by ceruloplasmin to Mn3+ and complexes with transfenin. Transferrin bound Mn3+ is taken up by the extrahepatic tissues. Mn is found in most organs and tissues and preferentially accumulates in the mitochondria. There is no storage form for Mn. Bone contains substantial amount of mineral but there is no mechanism to release it and thus bone Mn is considered as passive storage. It is released only as a result of normal bone turnover or in situations of accelerating bone resorption. Mn is almost totally excreted in the faeces (92%). Excess absorbed MI is quickly excreted by the liver into the bile to maintain homeostasis. Only trace amounts are excreted in urine.

 


Related Discussions:- Determine the fate of manganese which is absorbed

Ameoba, locomotion in amoeba

locomotion in amoeba

Regeneration - root and shoot morphogenesis, Regeneration - Root and Shoot ...

Regeneration - Root and Shoot Morphogenesis Higher plants have three kinds of regenerative activities; All plants possess inherent ability to regenerate lost parts. Fo

What is thigmotropism, What is thigmotropism? Thigmotropism is the move...

What is thigmotropism? Thigmotropism is the movement or growth of the plant in response to mechanical stimuli (touch or physical contact), as when a plant grows around a suppor

Signify the term - proglottids, Signify the term - Proglottids? Seriall...

Signify the term - Proglottids? Serially repeating segment like structures found in tapeworms which contain reproductive organs. Immature proglottids are continually added at t

Terrestrial biomes of the world, The primary factors that influence the for...

The primary factors that influence the formation of these biomes are climatic, like precipitation, temperature, seasonal extremes and winds. However, topography and light are also

Phylum porifera, harmful and beneficial usesa of phylum porifera

harmful and beneficial usesa of phylum porifera

Define growth studies for studying nutrient requirement, Define Growth Stud...

Define Growth Studies for studying Nutrient Requirement? Nutrient requirements of infants and young children are estimated by studying the rate of growth of healthy children an

Molecule that transports oxygen in red blood cells, Q. What is the name of ...

Q. What is the name of the molecule that transports oxygen in red blood cells? The respiratory pigment of the red blood cells is hemoglobin.

Elaborate about sarcodina: amoebas, Sarcodine protozoans are amoebas, and t...

Sarcodine protozoans are amoebas, and there are two types of them: shelled and naked. As you examine the prepared slides you should be able to see water expulsion vesicle, nucleus,

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