Maintenance of gut lining, Biology

Maintenance of Gut Lining

After studying the digestive enzymes you would wonder why the gut linings are not digested themselves. This is because animals have several mechanisms that protect their gut lining from auto digestion. The mucous membranes of vertebrates secrete a slightly alkaline mucous that lubricates the food and protects the lining cells from corrosive secretions.

In addition, the lateral surfaces of exposed epithelial cells are joined by tight junctions that prevent the secretions from penetrating between them. Careful studies have also revealed that the entire lining of the gut is renewed every third day in rats and every 2-6 days in humans. Similar mechanisms are present in invertebrates also. In insects, the fore-gut and hind gut are lined by cuticle. This lining is known as intima. Only in the midgut, the epithelial cells are exposed, where most of the digestion occurs. The midgut is lined by a delicate lining the peritrophic membrane in some insects. This corresponds to the mucous lining of vertebrates.

Posted Date: 1/15/2013 5:19:50 AM | Location : United States







Related Discussions:- Maintenance of gut lining, Assignment Help, Ask Question on Maintenance of gut lining, Get Answer, Expert's Help, Maintenance of gut lining Discussions

Write discussion on Maintenance of gut lining
Your posts are moderated
Related Questions
Q. Wound Botulism? It is the rarest form of botulism. The illness results when C. botulinum by itself or with other microorganisms infects a wound and produces toxins, which re

Name the high-energy complex generated during the conversion of succinyl CoA to succinate in the citric acid cycle GTP  or  ATP is  the high-energy  complex generated during th

Difference between Blind Spot and Yellow Spot - Blind Spot Y ellow spot 1. It lies litte away from yellow spot.   2. No pi

Define Nutritional Management of Eating Disorders? In the last unit, we focused on weight management. It is important to understand that the problems associated with too much d

Why is an S strain of bacteria able to cause disease in mammals but a R strain is not? The slippery capsule stops the cells of the defence system from capturing and destroying

What is peristomium. Describe? The segment behind the prostomium in annelids which contains the oral opening. This segment like the prostomium isn't a true segment and has no s


What is the tree girdling? What happens to the plant when that girdle is removed from the stem (below the branches)? Tree girdling or Malpighi's girdling is the removal from a

Infective Endocarditis :  All patients with prosthetic valve come under the high-risk category for endocarditis. They need prophylactic antibiotics if any procedure, which is like

Q. What are the proteins? How can the protein diversity of living beings be described? Proteins are molecules made of sequences of amino acids bound by a peptide bond. The g