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Related Concept Videos

Stomach pH Regulation01:21

Stomach pH Regulation

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The human body carefully regulates the internal pH of different organs to maintain homeostasis. For example, while the blood plasma maintains a neutral pH of 7, the stomach lumen has an acidic pH of 1.5 - 3.5. The low pH of stomach lumen helps kill pathogens in the food and break down complex food molecules.
The acid-secreting gastric mucosal epithelial cells (parietal cells) lining the stomach lumen maintain the low pH in the lumen. Numerous ion transporters and channels on these parietal...
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Stomach Histology01:26

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The stomach comprises several layers that work together to facilitate digestion and protect the organ. The outermost layer is called the serosa, which provides support and protection to the stomach. The muscularis externa layer is responsible for the mechanical breakdown of food by contracting and moving the stomach. The submucosa layer, located beneath the muscularis externa, contains connective tissue, blood vessels, nerves, and glands that secrete mucus and other substances essential for...
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The Colonization of Land02:22

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Changes in the environment of the early Earth drove the evolution of organisms. As prokaryotic organisms in the oceans began to photosynthesize, they produced oxygen. Eventually, oxygen saturated the oceans and entered the air, resulting in an increase in atmospheric oxygen concentration, known as the oxygen revolution approximately 2.3 billion years ago. Therefore, organisms that could use oxygen for cellular respiration had an advantage. More than 1.5 years ago, eukaryotic cells and...
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Gross Anatomy of the Stomach01:16

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The human stomach is a vital part of the digestive system, performing multiple functions. It is located within the peritoneum, a serous membrane that lines the abdominal cavity. The stomach plays a central role in processing food substances and interacts with other digestive organs through coordinated digestive processes. The stomach has a characteristic J-shape and is divided into four main regions. The cardia is the first section where the esophagus connects to the stomach and is the entry...
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Mucosal Barrier of the Stomach01:25

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The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
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Hormones Secreted by the Stomach01:25

Hormones Secreted by the Stomach

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Enteroendocrine cells, accounting for only 1% of stomach epithelial cells, play a significant role in digestion and are classified by their digestive hormone secretions.
Each of these hormones secreted by different enteroendocrine cells plays a unique role in digestion. Here are a few examples:
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Studying Murine Small Bowel Mechanosensing of Luminal Particulates
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GI Motility Testing: Stomach, Small Bowel, and Colon.

Allen Lee1, Jason Baker, William L Hasler

  • 1Division of Gastroenterology, University of Michigan, Ann Arbor, MI.

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|February 1, 2019
PubMed
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Gastrointestinal motility disorders cause common digestive symptoms. This review covers standard and novel tests for evaluating stomach, small bowel, and colon motility, aiding diagnosis and management.

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Area of Science:

  • Gastroenterology
  • Digestive Physiology

Background:

  • Abnormalities in gastrointestinal motility can cause symptoms like abdominal pain, nausea, vomiting, bloating, distention, diarrhea, and constipation.
  • Accurate diagnosis of these motility disorders is crucial for effective patient management.

Purpose of the Study:

  • To provide a comprehensive review of standard and novel gastrointestinal motility tests.
  • To summarize the indications, technical details, advantages, and disadvantages of various motility assessment methods.

Main Methods:

  • Review of existing literature on gastrointestinal motility testing.
  • Categorization of tests based on the region of the gastrointestinal tract studied (stomach, small bowel, colon).

Main Results:

  • Detailed summary of various motility tests, including their clinical applications.
  • Comparison of the strengths and limitations of different diagnostic approaches for gastrointestinal motility disorders.

Conclusions:

  • A range of motility tests are available for diagnosing gastrointestinal disorders.
  • Understanding the specifics of each test aids in selecting the most appropriate diagnostic tool for individual patient needs.