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相关概念视频

Gastric Motility01:16

Gastric Motility

774
Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
774
Gastric Emptying01:16

Gastric Emptying

880
Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
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Gastric Phase of Digestion01:26

Gastric Phase of Digestion

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The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
When food enters the stomach, it stretches the stomach walls and activates stretch receptors. This triggers local reflexes of the enteric nervous system, mediated through the myenteric plexus. These...
1.1K
Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

415
Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
415
Stomach pH Regulation01:21

Stomach pH Regulation

6.0K
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...
6.0K
Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

354
Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
354

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相关实验视频

Updated: Jul 14, 2025

One-anastomosis Gastric Bypass OAGB in Rats
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One-anastomosis Gastric Bypass OAGB in Rats

Published on: November 10, 2018

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胃质物优化的优化

Lara Avni1, Naama Farag1, Binita Ghosh1

  • 1School of Neurobiology, Biochemistry and Biophysics, Tel Aviv University, Tel Aviv, Israel.

Emerging topics in life sciences
|October 10, 2023
PubMed
概括
此摘要是机器生成的。

胃,早期发育的模型,经常显示变化. 这项研究定义了变性来源,并提出了控制它的方法,改进了它们在研究和医学中的使用.

关键词:
这是一种胃化物 (gastruloid).优化的优化优化优化.变化的可变性.

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Techniques of Sleeve Gastrectomy and Modified Roux-en-Y Gastric Bypass in Mice
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Generic Protocol for Optimization of Heterologous Protein Production Using Automated Microbioreactor Technology
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相关实验视频

Last Updated: Jul 14, 2025

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Published on: November 10, 2018

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科学领域:

  • 发展生物学 发展生物学
  • 干细胞生物学 干细胞生物学
  • 生物技术是生物技术.

背景情况:

  • 胃体是研究早期胚胎发育的一个有前途的模型.
  • 胃类模型的高变性阻碍了它们的可靠性和应用.
  • 了解和控制这种变异性对于推进发育生物学研究至关重要.

研究的目的:

  • 定义和分类不同级别的胃类变异性.
  • 识别导致胃类细胞发育变异的原因.
  • 提出控制和减少胃类型模型变异性的策略.

主要方法:

  • 系统地定义胃类变异性参数.
  • 分析胃发育变异的潜在来源.
  • 案例研究:利用胃体到胃体的变异来识别内皮形态的驱动因素.
  • 开发干预措施,以引导胃形态结果.

主要成果:

  • 建立了一个在多个层面上量化胃类变异性的框架.
  • 通过分析inter-gastruloid变异,确定了影响最终内皮形态的关键因素.
  • 证明了成功的干预措施,以引导胃体发育到期望的形态结果.

结论:

  • 控制胃体变异性提高了它们作为模型系统的实用性.
  • 减少变异性将提高胃类研究的可复制性和预测能力.
  • 优化的胃体模型具有基础科学和生物医学应用的巨大潜力.