Define absorption, storage and elimination of ascorbic acid, Biology

Assignment Help:

Define Absorption, Storage and Elimination of ascorbic acid?

Ascorbic acid is rapidly absorbed from the intestines primarily by active transport.  Simple diffusion or carrier-mediated transport may also contribute to a small extent of uptake of the vitamin from the mouth and stomach. Prior to absorption,  ascorbate  may be oxidized to form dehydroascorbate which is absorbed by passive diffusion or by use of glucose transporters. It passes through the portal vein to the general circulation and to all tissues. Each organ or tissue has an optimal saturation level of ascorbic acid. It is not stored to any appreciable extent in the body. The degree of absorption decreases with increased vitamin intake and varies from 16% to 98%, the average overall absorption being about 80% to 95%. Unabsorbed vitamin C may be metabolized by the intestinal flora. Pectin and zinc are a few substances that impair its absorption. Excess is excreted in urine.


Related Discussions:- Define absorption, storage and elimination of ascorbic acid

How do cells obtain energy for their functioning, How do cells obtain energ...

How do cells obtain energy for their functioning? Cells obtain energy for their metabolic reactions from the breaking of organic molecules with high energetic content. This ene

Contamination of the implant body before insertion, Contamination of the Im...

Contamination of the Implant Body before Insertion The implant may be contaminated by manufacturing error, by the operator, from non titanium instrumentation and by the bacteri

Awareness for diabetes mellitus, Q. Awareness for diabetes mellitus? Aw...

Q. Awareness for diabetes mellitus? Awareness should be generated in the community to prevent the diabetes mellitus, since we know prevention is better then cure. Use behav

Determine about the psychological tests, Determine about the Psychological ...

Determine about the Psychological tests The construct of attention has been found to comprise several interrelated elements that the paediatric neuropsychologist can consider i

Bacterial food infections, Food infection occurs when a pathogen enters the...

Food infection occurs when a pathogen enters the gastrointestinal tract and multiplies. Microorganisms can penetrate into the intestinal mucosa and grow there, or they can pass thr

Parts of a typical flower with all its definations , parts of a typical fl...

parts of a typical flower? define its parts and internal parts completely? show complete colourful diagram?

Explain prophylaxis with antimicrobial, Explain Prophylaxis with antimicrob...

Explain Prophylaxis with antimicrobial Prophylaxis with antimicrobials has decreased the incidence of surgical site infection after head and neck operations that involve an inc

Gamete formation, During the life cycle of most animals, some diploid cells...

During the life cycle of most animals, some diploid cells undergo meiosis and haploid form in a process called gametogenesis. Spermatogenesis: In the testes of the male, the

#titlemicrobiology.., topics relating research on microorganisms and their ...

topics relating research on microorganisms and their application ?

Define low water permeability across the luminal membranes, A healthy perso...

A healthy person is on a diet that having of very small amounts of water. A. This person will make a large volume of dilute urine with low amounts of dissolved solutes. B. T

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