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

Describe the concept of the gene, Through the year of 1960s, the gene was c...

Through the year of 1960s, the gene was clearly explained as the region of DNA which gives increase to a single polypeptide or to a one RNA for genes whose final product is RNA not

State the principles of behaviour change communication, Principles of behav...

Principles of behaviour change communication - BCC should be integrated with program goals from the starting. BCC is a necessary part of diabetes prevention, care and support p

How nutritional status affects the bmr, How Nutritional status affects the ...

How Nutritional status affects the BMR? Under nutrition and starvation are the factors which require consideration. Prolonged under nutrition or starvation causes a reduction o

Define poverty alleviation to control under nutrition, Define Poverty Allev...

Define Poverty Alleviation to control under nutrition? There are a number of development programmes aiming at employment assurance to the landless and other labour with a focus

Oxygenator- equipment of cardio pulmonary bypass , Oxygenator :   They serv...

Oxygenator :   They serve the function of lungs during extra corporeal circulation (ECC) - Oxygenation, removal of carbon dioxide and transport of gaseous anaesthetic agents:*The o

What do you mean by neurotransmitters, Q. What do you mean by neurotransmit...

Q. What do you mean by neurotransmitters? - Nicotinic receptors (nicotine mimics the effects of Ach here). Found at NM-junction, ANS ganglions in general. Binding of Ach to

Define homogenization or blending of food sample, Define Homogenization or ...

Define Homogenization or Blending of Food Sample? Food homogenization - Liquid food samples are mixed manually before analyzing whereas solid foods are homogenized in a diluent

Phases of water, Phases of Water The state of water can be changed from...

Phases of Water The state of water can be changed from gaseous to liquid and liquid to solid and vice versa by the addition or removal of heat energy. To convert one gram of li

Explain the solid-liquid equilibria, Explain the Solid-Liquid Equilibria? ...

Explain the Solid-Liquid Equilibria? A freezing-point curve (freezing point as a function of liquid composition) and a solubility curve (composition of a solution in equilibriu

What are the colors absorbed by plants, Q. What are the colors (of the elec...

Q. What are the colors (of the electromagnetic spectrum) absorbed by plants? What would happen to photosynthesis if the green light waves that reach a vegetable were blocked? C

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