胃は,迅速な栄養補強センサーの場所として,

J A Deutsch, M L Wang

Science (New York, N.Y.)

|January 7, 1977

まとめ

ネズミは,胃に直接送られる栄養素に関連する味を好むことを学びました. これは胃の動きを示しています.

科学分野:

生理学生理学とは
神経科学は神経科学である.
胃腸内科胃腸内科

背景:

胃は,栄養素の検出と満腹感のシグナル伝達において重要な役割を果たします.
栄養素を感知する胃の役割を理解することは,代謝研究にとって不可欠です.

研究の目的:

経口や腸内からの信号とは無関係に栄養素を素早く検出する胃の能力を調べる.
胃の膨張や栄養素の存在が学習した味の好みを誘発するかどうかを判断する.

主な方法:

ネズミは,胃の排泄を制御するために,ピロリックマンチーフで外科的に準備されました.
2つの非栄養的な溶液が提供され,一つは胃内栄養素注入と,もう一つは塩水とペアリングされました.
味覚の好みは,溶液の摂取量に基づいて評価されました.

主要な成果:

ネズミは,胃内栄養素注射と組み合わせた味に明確な好みを示しました.
この好みは急速に確立され,胃内の迅速な感覚検出メカニズムを示しています.
ピロリックカフの膨張は,学習した好みを防ぐことはできず,胃の栄養分を感知することが重要なことを示唆しています.

結論:

胃は栄養素を素早く感知する能力を持ち,学習した味覚の好みに影響を与えます.
胃の栄養素の検出は,口腔の感覚入力や胃後処理とは無関係に起こる可能性があります.
これらの発見は,食物の摂取と栄養素のホメオスタシスを調節する胃の重要な役割を強調しています.

さらに関連する動画

09:29

Fabrication and Implantation of Miniature Dual-element Strain Gages for Measuring In Vivo Gastrointestinal Contractions in Rodents.

Published on: September 18, 2014

07:29

Real-time Analysis of Gut-brain Neural Communication: Cortex wide Calcium Dynamics in Response to Intestinal Glucose Stimulation

Published on: December 29, 2023

関連する概念動画

01:37

Neural Regulation

Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.

01:40

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.

02:35

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the atmosphere, the...

01:21

Stomach pH Regulation

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...

01:16

Gastric Motility

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...

01:22

Physiology of the Gastrointestinal System II: Digestion and Absorption

The gastrointestinal (GI) tract, extending from the mouth to the anus, plays a pivotal role in the digestion and absorption of nutrients. This process involves both mechanical and chemical actions facilitated by various enzymes.
Digestion begins in the mouth, where food undergoes mechanical breakdown by chewing and combines with saliva. Salivary amylase, an enzyme in saliva, starts the breakdown of starches into maltose. The food then travels down the esophagus to the stomach.
In the stomach, a...

関連する実験動画