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

Determine the different types of sensory receptors, Determine the different...

Determine the different types of sensory receptors There are different types of sensory receptors as follows:  Visual receptors in the eyes for vision.  Auditory receptor

What are the clinical warning signs of implant failure, Clinical warning si...

Clinical warning signs of implant failure The clinical signs of implant failure are: 1) Connecting Screw loosening. 2) Connecting Screw failure. 3) Gingival bleeding a

What are the antigens and antibodies of abo blood system, What are the anti...

What are the antigens and antibodies of each blood type of the ABO blood system? Type A: antigen A, antibody anti-B. Type B: antigen B, antibody anti-A. Type AB: antigens A and

Explain zymogen, Zymogen :- an  inactive form of an  enzyme; becomes active...

Zymogen :- an  inactive form of an  enzyme; becomes active prior to its action.

Show the process of synaptic transmission, Q. Fluoxetine is an antidepressa...

Q. Fluoxetine is an antidepressant drug that presents an action mechanism related to the synaptic transmission. What is that mechanism? Fluoxetine is a substance that inhibits

Hearing equilibrium, EQUILIBRIU M - Cristae and maculae are concerned ...

EQUILIBRIU M - Cristae and maculae are concerned with equilibrium. 1 .       DYNAMIC EQUILIBRIUM - Cristare detect turning or rotational movement of head ( angular ac

Categories of gifted species, Categories of Gifted Species This group ...

Categories of Gifted Species This group of nitrogen fixers has been divided into three categories: Rhizobium which includes fast growing species, Bradyrhizobium which

Counselling skills used in diabetes mellitus, Q. Counselling skills used in...

Q. Counselling skills used in diabetes mellitus? Information gathering is an important skill for understanding of the client. Behaviour is complex and, therefore it is importan

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