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Stomach pH Regulation

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.
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pH Homeostasis

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Determination of the Gas-phase Acidities of Oligopeptides

Determination of the Gas-phase Acidities of Oligopeptides

Published on: June 24, 2013

THE ACID-BASE COMPOSITION OF GASTRIC SECRETIONS.

J L Gamble¹, M A McIver,

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

The Journal of Experimental Medicine

|October 30, 2009

Summary

This summary is machine-generated.

This study analyzed inorganic factors in cat stomach secretions, finding chloride and fixed base concentrations vary. These variations help explain how the body manages electrolytes during digestion and secretion loss.

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Measurement and Analysis of Extracellular Acid Production to Determine Glycolytic Rate

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Published on: December 12, 2015

Area of Science:

Gastroenterology
Physiology
Biochemistry

Background:

Gastric secretions play a crucial role in digestion and maintaining electrolyte balance.
Understanding the inorganic composition of stomach secretions is vital for physiological studies.
Previous research has indicated the presence of key ions in gastric juice, but detailed analysis of pouch secretions is ongoing.

Purpose of the Study:

To determine the chief inorganic factors (chloride ion and fixed base) in isolated fundic and pyloric antrum stomach pouch secretions in cats.
To investigate the variations in fixed base concentration during and after food digestion.
To elucidate the relationship between fixed base, chloride ion, and hydrogen ion concentrations in fundic secretions.

Main Methods:

Collection of secretions from isolated fundic and pyloric antrum pouches in cats.
Analysis of chloride ion and fixed base concentrations (in cc. 0.1 N per 100 cc.) in collected samples.
Comparison of ionic content during food digestion versus post-digestion periods.

Main Results:

Chloride ion concentration in fundic pouch secretions remained relatively stable (approx. 165 cc. 0.1 N/100 cc.).
Fixed base concentration in fundic secretions varied significantly, averaging 47 cc. 0.1 N/100 cc. during digestion and increasing up to 140 cc. 0.1 N/100 cc. post-digestion.
Pyloric pouch secretions showed an excess of fixed base over chloride ion, and fundic variations were linked to sodium content, suggesting a common mucous secretion composition.

Conclusions:

Fundic secretions maintain a stable total ionic content through chloride ion concentration, with fixed base variations influencing hydrogen ion concentration.
The observed variations in fixed base are likely due to the admixture of a mucous secretion with fundic gland juice.
The findings help explain electrolyte withdrawal from blood plasma during continuous loss of stomach secretions.