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

What is dry mass, What is dry mass? When biomasses are compared often t...

What is dry mass? When biomasses are compared often the method of dry mass is used. The dry mass is the total mass less the water mass of an individual. The total mass is also

State the term supply shortly, State the term supply shortly. Supply...

State the term supply shortly. Supply: Potential firms or businesses into the market which are willing and capable to supply various quantities of a good or service at a

Fdas post marketing surveillance system works, Problem 1: How does the ...

Problem 1: How does the FDA's post marketing surveillance system works? Show FDA's post marketing surveillance system Explain about Adverse Event reporting system and

What is vacuole , What is Vacuole ? Another structure found only in pla...

What is Vacuole ? Another structure found only in plant cells is the large central vacuole. The vacuole stores enzymes and waste products, in addition to providing the turgor p

Explain indications of root-end filling (ref) - retrofilling, Explain Indic...

Explain Indications of Root-End Filling (REF) Retrofilling a. Persistent periapical pathosis resulting from an inadequate apical seal that cannot be corrected nonsurgically,

Glomerular filtrate in comparison to the blood, Q. What is the major transf...

Q. What is the major transformation presented by the glomerular filtrate in comparison to the blood? Glomerular filtrate is the name given to the plasma after it has entered th

Natural selection and genetic drift, Tell me which statement belongs to eit...

Tell me which statement belongs to either natural selection, genetic drift, or gene flow Can you tell me if I am correct? -Consistently causes a population to become better adapted

Define types of indicators, Define Types of Indicators? Macro indicator...

Define Types of Indicators? Macro indicators are used at strategic levels while micro indicators are used at performance levels. From the previous sections it is clear that man

What main idea, What key idea, contained in Malthus's essay on populations,...

What key idea, contained in Malthus's essay on populations, helped Darwin formulates his theory of natural selection?

Multiple alleles, MULTIPLE ALLELES (i)         More than two alternativ...

MULTIPLE ALLELES (i)         More than two alternative forms (alleles) of a gene in a population occupying the same locus on a chromosome or its homologue are known as multiple

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