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Q. Explain about Gastric ulcers?
Gastric ulcers occur in the lesser curvature of the antrum of stomach. A gastric ulcer appears to be caused by reflux of bile and factors that disrupt the mucosa barrier permitting the hydrogen ions to diffuse into the mucosal tissue where they cause damage. The damage causes cell destruction and subsequent ulceration (due to defect in pyloric sphincter). NSAID dramatically increase the risk of ulcers and is related to the systemic inhibition of prostaglandin production. Thus results in impaired defense against acidity by the gastric mucosa. Another pathogenetic factor is H. Pylori infection and the resulting impaired mucosal defence.
Cutaneous respiration in frog Frog belongs to class Amphibia under vertebrates. It is an amphibious animal which can live both on land and in water. Skin is very impor
Stems transport liquids (a) Cut about 2 cm from the end of stems of celery and place them in cold water for about an hour to freshen. Next place the stems in dishes having red
Basic characters of vertebrate classes
Why do cells of the nephron tubules present a great amount of mitochondria? The cells of the tubule wall have high number of mitochondria because lots of substances are resorbe
Tina administered 1 liter of sterile distilled water IV to a patient. Predict the direction (increase, decrease, no change) you would expect Tina's infusion to have produced in the
The mathematical, statistical and computing methods that aim to resolve biological queries using DNA and amino acid sequences and related information is called as Bioinformatics.
The transport system in earthworm The scientific name of earthworm is megascolex. It consists of hearts, blood vessel and blood. There are 8 pairs of hearts in the earthw
difference between anaerobic respiration and fermentation
Domesticated animals provide much of the world's meat products today, but wildlife still constitutes to be an imp ortant source of food of many rural communities. The International
Select all of the correct/true answers. The rate of mutation of a given species can be predicted. Mutations are a source of new alleles and contribute to the biodiversity present o
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