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Related Concept Videos

Pancreatic Juice and Secretion01:26

Pancreatic Juice and Secretion

Pancreatic juice is a clear fluid produced by the pancreas, containing water, salts, sodium bicarbonate, and enzymes vital for digestion in the small intestine. It helps break down large molecules, facilitating nutrient absorption.
When acidic chyme from the stomach enters the duodenum, it triggers the release of secretin, a hormone that prompts pancreatic juice secretion. After a fatty meal, cholecystokinin, another hormone, stimulates gallbladder contraction and enhances enzyme-rich...
Bile01:19

Bile

Bile is a crucial bodily fluid, characterized by its yellow-green color and alkaline nature. Produced in the liver, it is transported through the common hepatic duct into either the cystic duct, leading to the gallbladder, or directly into the common bile duct. The flow of bile is regulated by the sphincter of Oddi located at the entrance of the duodenum. When this sphincter is closed, bile is redirected to the gallbladder for storage and concentration.
Bile is released when dietary fats enter...
Pancreas01:19

Pancreas

The pancreas, an essential organ in the human body, is a pinkish-gray elongated structure located posterior to the stomach. It extends laterally from the duodenum towards the spleen and is firmly bound to the posterior wall of the abdominal cavity. The organ's surface has a lumpy, lobular texture that gives it a unique appearance.
The broad head of the pancreas lies within the loop formed by the duodenum, while its slender body reaches towards the spleen. The tail of the pancreas is short and...
Cells and Secretions of the Pancreas01:16

Cells and Secretions of the Pancreas

The pancreas, a vital organ within the abdominal cavity, plays dual roles in the digestive and endocrine systems, collaborating with exocrine and endocrine cells to maintain optimal digestion and blood sugar levels.
Exocrine function is carried out by acinar cells, organized into clusters known as acini. These cells contribute to digestion by releasing substantial quantities of enzyme-rich, alkaline digestive juices.
Concurrently, the dispersed clusters of endocrine cells throughout the...
Renal Regulation of Acid-Base Balance01:29

Renal Regulation of Acid-Base Balance

Metabolic reactions in the body produce nonvolatile acids, such as sulfuric acid, which generate an acid load of approximately 1 mEq of H+ per kilogram of body weight daily. Excreting H+ in the urine is essential to balance this acid load.
In the kidneys, cells within the proximal convoluted tubules (PCT) and the collecting ducts secrete hydrogen ions (H+) into the tubular fluid. Specifically, in the PCT, Na+/H+ antiporters secrete H+ while reabsorbing Na+.
However, the intercalated cells in...
pH Homeostasis01:31

pH Homeostasis

Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory Regulation of...

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Isolation of Proximal Fluids to Investigate the Tumor Microenvironment of Pancreatic Adenocarcinoma
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Isolation of Proximal Fluids to Investigate the Tumor Microenvironment of Pancreatic Adenocarcinoma

Published on: November 5, 2020

ACID-BASE COMPOSITION OF PANCREATIC JUICE AND BILE.

J L Gamble1, M A McIver,

  • 1Departments of Pediatrics and Surgery, Harvard Medical School, Boston.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Digestive secretions like pancreatic juice and bile maintain electrolyte balance. Loss of these fluids can lead to dehydration and reduced bicarbonate levels in blood plasma.

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Area of Science:

  • Biochemistry
  • Physiology
  • Gastroenterology

Background:

  • Pancreatic juice and bile are crucial digestive fluids with specific electrolyte compositions.
  • Understanding the ionic concentrations in these secretions is key to comprehending fluid balance.
  • Blood plasma serves as a reference for normal electrolyte levels.

Purpose of the Study:

  • To analyze the electrolyte composition of pancreatic juice and bile.
  • To compare these compositions with blood plasma.
  • To infer the physiological consequences of losing these digestive secretions.

Main Methods:

  • Analysis of fixed base, chloride ion, and bicarbonate ion concentrations in pancreatic juice and bile.
  • Comparison of these concentrations with those found in blood plasma.
  • Inference of physiological changes based on electrolyte shifts.

Main Results:

  • Pancreatic juice has a fixed base concentration similar to blood plasma, with chloride and bicarbonate ions composing the remainder.
  • Hepatic duct bile shows electrolyte concentrations close to blood plasma.
  • Gallbladder bile exhibits doubled fixed base concentration and significantly reduced chloride ion levels compared to hepatic duct bile.

Conclusions:

  • Variations in pancreatic juice bicarbonate levels are linked to chloride ion concentration changes.
  • Loss of digestive secretions without replacement can lead to blood plasma dehydration.
  • Reduced plasma bicarbonate levels are a potential consequence of losing these vital digestive fluids.