Preview

Helicobacter Pylori Case Study

Satisfactory Essays
Open Document
Open Document
247 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Helicobacter Pylori Case Study
1) Describe how Helicobacter pylori survive and lives in the gastric mucosa

The shape of the H. pylori bacteria is spiral. These bacteria survive the stomach by activating their cytoplasm to produce an enzyme that neutralizes the stomach acid. This enzyme is known as urease, which then changes the urea into carbon dioxide and ammonia. The ammonia is secreted around the cell to protect it from being phagocytized. These two enzymes work together to neutralize the strong stomach acid called hydrochloric acid. For the bacteria to colonies the stomach, this process has to be repeated itself continuously. The bacteria cell becomes vulnerable to the stomach acid, when enough urea and ammonia are not produce by it.

2) What are the effects of H pylori

You May Also Find These Documents Helpful

  • Good Essays

    11) Hydrochloric acid is secreted by which of the secretory cells of the stomach? Parietal cells…

    • 1167 Words
    • 5 Pages
    Good Essays
  • Better Essays

    Zachary’s stomach contributes to the formation of ulcers in other parts of the G.I. tract by the acids needed to breakdown food are excessive and cause the stomach to over work therefore causing surrounding parts to be over worked as well. If the stomach is always churning food the digestion processes is always on going. Parietal cells and gastric glands are directly related to the formation of ulcers. A major causing factor is chronic inflammation due to Helicobacter pylori that colonizes the mucosa. The immune system is unable to clear the infection, despite the appearance of antibodies. Thus, the bacterium can cause a chronic active gastritis. Gastrin stimulates the production of gastric acid by parietal cells. In…

    • 1145 Words
    • 4 Pages
    Better Essays
  • Better Essays

    When we vomit, the acidic nature of our stomach contents becomes immediately apparent both from the taste and from the burning sensation in our throats. The purpose of this acidity is to kill any bacteria we swallow with our food. In the stomach, digestive enzymes and a muscular churning action combine to reduce our food to a thick liquid called chyme. Chyme exits the stomach through a second sphincter and enters the small intestine. Typically, it takes the stomach about 4 hours to process a meal. The small intestine is about 20 feet long. In the duodenum, the first foot of the small intestine, digestion continues with the breakdown of proteins, fats, carbohydrates, and nucleic acids. Some of the digestive enzymes at work in the duodenum are made by the small intestine itself. Others are made by the pancreas. Pancreatic enzymes play an important role in neutralizing food, which arrives from the stomach in a highly acidic condition. In addition, the small intestine receives bile, a substance that is produced in the liver and stored in the gall bladder. Bile is an emulsifier?it breaks fats into tiny droplets that are more easily attacked by enzymes. Beyond the duodenum, the rest of the small intestine functions primarily in absorbing nutrients into the body. In order to be able to do this efficiently?that is, rapidly?the small intestine has a huge surface area. It is covered with numerous fingerlike projections called villi, each of which is in turn covered with tiny little projections called microvilli. Flattened, the small intestine would fill the area of a tennis court! Digested nutrients are absorbed across the surface of the small intestine into capillaries found inside each villus.…

    • 4740 Words
    • 19 Pages
    Better Essays
  • Good Essays

    AQA Exam Answers

    • 969 Words
    • 4 Pages

    e) Protein can be used to build up cells as it is a structural component of every cells. It is also an enzyme as well.…

    • 969 Words
    • 4 Pages
    Good Essays
  • Good Essays

    coli is a gram negative, bacterium found in the lower intestine of warm blooded organisms. Although E.coli strains are harmless there are serotypes that can cause food poisoning in humans. [2] Harmless strains can be found in the flora of the gut and produce vitamin k¬¬2 and prevent pathogenic bacteria from establishing and are therefore beneficial to the host. The major cause for disease is fecal to oral transmission. It is an ideal candidate for bacterial transformation because it is made of only one cell, reproduces every 20 minutes, is not harmful to people, and cannot survive outside the…

    • 463 Words
    • 2 Pages
    Good Essays
  • Good Essays

    It receives partially digested food (known as chyme) from the stomach and plays a vital role in the chemical digestion of chyme in preparation for absorption in the small intestine.…

    • 664 Words
    • 3 Pages
    Good Essays
  • Better Essays

    PBHL 3100 Group #4 Foodborne Illness Salmonellosis Foodborne illness, more commonly called food poisoning, is the cause of nearly 48 million illnesses, and an estimated 3,000 deaths in the United States annually. Food poisoning is caused by a bacterial, viral, or parasitic contamination of food. It can happen at any point during the food production realm; growing, harvesting, processing, storing, shipping, or preparing. There are several bacterial, viral, or parasitic agents that can cause food poisoning. The Centers for Disease Control and Prevention (CDC) estimates that 90% of these illnesses are due to the seven most common pathogens: Salmonella, Norovirus, Campylobacter, Toxoplasma, E. coli O157:H7, Listeria and Clostridium perfringens.…

    • 1098 Words
    • 5 Pages
    Better Essays
  • Good Essays

    Zachary S Story

    • 619 Words
    • 3 Pages

    The way that the stomach can contribute to the formation of ulcers in other parts of the GI tract is by the acid and pepsin that is needed for the breakdown of food when there is too much and the stomach is not able to defend itself against the digestive fluids. The secretory cells called gastric glands and the parietal cells are directly related to the formation of ulcers.…

    • 619 Words
    • 3 Pages
    Good Essays
  • Good Essays

    When the burger reaches the stomach, the epithelium, or stomach wall, secretes gastric juice which has a very high concentration of hydrochloric acid and breaks up the burger. In the gastric juice is also an enzyme that hydrolyzes proteins called pepsin. This pepsin starts out as the inactive pepsinogen, and is activated by hydrochloric acid in the epithelium. After this, the burger is churned in the stomach and becomes chyme, or vomit.…

    • 362 Words
    • 1 Page
    Good Essays
  • Satisfactory Essays

    Biology 109 Study Guide

    • 1541 Words
    • 7 Pages

    Information that you should know, and questions that you should be able to address. 1. Define the following terms: positive phototaxis, negative phototaxis, endospore, binary fission, phototroph, chemotroph, autotroph, heterotroph, obligate aerobe, facultative anaerobe, obligate anaerobe, bioremediation 2. 3. What are the two main branches of prokaryotic evolution? What are the components of a prokaryotic cell wall?…

    • 1541 Words
    • 7 Pages
    Satisfactory Essays
  • Good Essays

    This is a diagram of a prokaryote cell and it shows that they are not very complex cells. They do not contain any membrane bound organelles and they have relatively small ribosomes. They also do not contain and endoplasmic reticulum.1 The DNA is not stored in a nucleus but it is stored in the nucleoid. DNA in the cytoplasm and many prokaryotic cells also contain very small loops of DNA called plasmids. The nucleoid region is the area of the cytoplasm, which contains the single bacterial DNA molecule. Some prokaryotic cells have a capsule, which is an outer layer of protection which protects the cell when being engulfed by other organisms. It also helps the cell stick to surfaces and nutrients. The cell wall (which contains murein) protects and gives the cell shape. In the centre of the cell there is the cytoplasm which is composed mainly of water but also contains digestive enzymes, salts, organelles and other organic molecules. The prokaryotic cell also has a cell or plasma membrane which controls the movement of substances in and out of the cell. The pili are short, hair-like structures which attach the cell to other bacterial cells. Finally, the bacterial flagellum is a long ‘tail’ which helps the cell move.2…

    • 1203 Words
    • 5 Pages
    Good Essays
  • Satisfactory Essays

    biology lab

    • 262 Words
    • 2 Pages

    What could you determine about a specimen if you observed a slide image showing the specimen with a cell wall, but no nucleus or mitochondria?…

    • 262 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Once in the stomach, gastric juices which have been secreted into the stomach mix with the food and begin the enzymatic digestion of proteins. The food is then passed through the pyloric sphincter into the duodenum.…

    • 286 Words
    • 2 Pages
    Good Essays
  • Good Essays

    zacharys story

    • 445 Words
    • 2 Pages

    a. Zach’s stomach contributes to the formation of ulcers by the acids needed to breakdown food when they are excessive. Parietal cells (secrete HCI) and gastric glands (acetylcholine) are directly related to the formation of ulcers.…

    • 445 Words
    • 2 Pages
    Good Essays
  • Good Essays

    * Acid conditions denature proteins and suit protein digestion by hydrolysis protease secreted in the stomach ( pepsin) begins the process by breaking up polypeptides into shorter chains of amino acids…

    • 718 Words
    • 3 Pages
    Good Essays