Explain the stool weight and laxation, Biology

Assignment Help:

Explain the Stool weight and laxation?

The amount of stool excreted varies markedly from individual to individual and in an individual over a period of time. Faeces are complex and consist of water, unfermented fibre, excreted compounds and bacterial mass. Of the dietary constituents, dietary fibre has been shown to influence the stool weight to a great extent, The ability of different types of fibres to increase faecal bulk depends on a complex relationship between the chemical and physical properties of the fibre and the bacterial population in the colon. In general, faecal bulk increases as fibre fermentability decreases.

The mechanism by which a fibre increases stool weight is through the water- holding capacity of unfermented fibre. Animal and human studies have indicated that cereal fibres have the greatest faecal bulking power. Wheat bran added to the diet increases stool weight in a predictable linear manner and decreases intestinal transit time. Besides quantity, the particle size is also important. Coarsely ground wheat bran has little or no effect and may even be constipating. Fibre may influence faecal output by another mechanism. Colonic microbial growth may be stimulated by ingestion of fermentable fibre sources. Bacteria are an important component of faecal mass. However, increase in weight does not always occur from eating these fibres. Some laxative effects may be due to volatile SCFAs produced during fermentation. Osmotic effects of these fermentation products may also be important but this mechanism is not yet well defined.


Related Discussions:- Explain the stool weight and laxation

Effects on plants of air pollutants, Effects on plants of Air pollutants ...

Effects on plants of Air pollutants SO 2 , O 3 and NO 2 are strong oxidants and can bring about significant changes in plant cell chemistry. The general effects of pollutant

Explain what is inversion, Explain what is Inversion ? Inversion is ano...

Explain what is Inversion ? Inversion is another way in which genetic recombination can occur, as seen below. In this case, the change occurs within a chromosome, rather than b

How is light from the sun transformed into chemical energy, How is light fr...

How is light from the sun transformed into chemical energy to be used by the living beings on earth? Light from the sun is transmitted into chemical energy contained in organic

Aspergillosis, Aspergillosis Aspergillosis is the most common chronic,...

Aspergillosis Aspergillosis is the most common chronic, granulomatous, necrotizing and cavitary disease of lungs, and is characterized by formation of white yellowish caseous

Explain two divisions of meiosis, Q. What are the two divisions of meiosis ...

Q. What are the two divisions of meiosis and what are the major events that occur in those divisions? Meiosis is divided into first meiotic division, or meiosis I, and second m

Poultry and duck diseases-avian encephalomyelitis, Avian encephalomyelitis ...

Avian encephalomyelitis This is an acute infectious disease of birds (3 weeks old), which is caused by a member of the genus Enterovirus in the family Picornaviridae. Epid

What is galactosemia, Q. What is Galactosemia? Galactosemia is a geneti...

Q. What is Galactosemia? Galactosemia is a genetic disorder caused by deficient functioning of any of these three enzymes namely galactokinase, galactose -1 - phosphate uridyl

How can neuroscience help to find neurological disorders, How can "basic" ...

How can "basic" neuroscience research help to find cures for neurological disorders? A better understanding of the brain at each level - molecules, cells and neural systems -is

Pattern of growth, P A TTERN OF GROWTH - 1 .       ISOMETRIC - ...

P A TTERN OF GROWTH - 1 .       ISOMETRIC - In it an organ grows at the same rate as the rest of body. External form of body is not changed. eg. fish, locust. 2 .

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