Digestion of carbohydrates, Biology

Assignment Help:

Digestion of carbohydrates

Carbohydrate digestion in vertebrates and invertebrates is very similar. All the enzymes shown in Table are not required by all animals. The enzymes present are related to the food habits of the animal. However, amylase and maltase are of universal occurrence. Amylase is secreted in the saliva of man and in larger amounts by the pancreas. Enzyme production in some animals is also influenced by genetic characteristics and enzyme induction. For example, production of maltase and sucrase by the intestinal villi depends on the amount of ingested sugar. If a high maltose or sucrose diet is taken it induces the villi to produce more maltase and sucrase within 2-5 days. Lactase production declines in humans as gut develops after infamy. It ceases in some individuals so that they can no longer hydrolase this sugar. Now let us consider the digestion of cellulose, the most important structural material of plants and a major component of the diet of herbivores. Very few animals possess the enzyme cellulases. Then how do animals that feed on plants breakdown this carbohydrate? Cellulases enzymes are synthesised by many bacteria and protistans which live symbiotically in many herbivores and insects. Cellulose digestion is carried on by the help of these symbiotic microorganisms. The microorganisms live in the stomach of the ruminants (i.e. cow, sheep, etc.) and breakdown the cellulose. The breakdown products are then utilised by the host. In some invertebrates like silver fish (Ctenolepisma lineata) true cellulases have been reported but the insect cannot survive on an only cellulose diet. Some other invertebrates also have some cellulases that partly digest cellulose but none show conclusive evidence of a complete breakdown of cellulose into glucose without the help of symbionts.

Digestion of carbohydrates

1459_Digestion of carbohydrates.png


Related Discussions:- Digestion of carbohydrates

Excretion, How many kidney in man?

How many kidney in man?

Metamorphosis, ME T AMORPHOSIS The differentiation results in the for...

ME T AMORPHOSIS The differentiation results in the formation of larva / infant. The formation of adult from the larva / infant is called as metamorphosis. The metamorph

Explain the nutritional and functional role of zinc, Minerals  :-  Zinc ...

Minerals  :-  Zinc Food Source      Meats, cereals.  Nutritional Functional role Essential nutrient: Deficiency produces loss of appetite, growth retardation, skin

Prolactin - vertebrates, Normal 0 false false false EN-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Mode of nutrition , What is the mode of nutrition in fish,human,amoeba,scor...

What is the mode of nutrition in fish,human,amoeba,scorpian & toad ?

What is panoramic x-ray, What is Panoramic X-Ray This is one of the mos...

What is Panoramic X-Ray This is one of the most vital radiological techniques in planning placement of dental implants. Not only will it give you the complete picture of the pe

Foraminifera, Foraminifera is the single-celled protists which secrete a s...

Foraminifera is the single-celled protists which secrete a shell or test. This is the accumulations of the shells of dead foraminifera and the other microscopic sea creatures form

What is phagocytosis and phagosomes?, Protozoans ingest food by phagocytosi...

Protozoans ingest food by phagocytosis, and consequently, the ingested food is surrounded by a plasma membrane creating a food vacuole, or phagosome. Digestion does not start until

Explain dose-scaling, Dose-scaling Toxicological equivalent doses in a...

Dose-scaling Toxicological equivalent doses in animals and humans are a debatable issue. The Joint FAOIWHO Expert Committee on Food Additives (JECFA) and Joint FA01 WHO Meetin

Chromosome partitioning depends on polymerization state, Chromosome partiti...

Chromosome partitioning depends on changes in the polymerization state of bacterial proteins that are functionally analogous to what eukaryotic protein?

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