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[Physiology of carbohydrate absorption (author's transl)]
Wiener Medizinische Wochenschrift (1946)
|June 30, 1979
Summary
The enterocyte brush border possesses enzymes for disaccharide splitting, adapting quickly to physiological needs. Glucose and galactose absorption is active, while fructose uses facilitated diffusion, and other monosaccharides are absorbed passively.
Area of Science:
- Biochemistry
- Cell Biology
- Gastroenterology
Context:
- The chymus primarily relies on salivary and pancreatic enzymes for carbohydrate breakdown.
- Enterocytes, lining the small intestine, are crucial for final carbohydrate digestion and absorption.
- Brush border enzymes in enterocytes play a vital role in processing disaccharides.
Purpose:
- To detail the enzymatic activities and transport mechanisms for carbohydrate absorption in enterocytes.
- To highlight the adaptive capabilities of enterocyte disaccharidases.
- To differentiate the absorption pathways for various monosaccharides.
Summary:
- Enterocytes possess brush border enzymes for efficient disaccharide hydrolysis, demonstrating rapid physiological adaptation.
- Disaccharidase activity and glucose transport are modulated by luminal sodium concentration.
- Glucose and galactose are absorbed via active transport, fructose via facilitated diffusion, and other monosaccharides passively.
Impact:
- Provides a comprehensive overview of intestinal carbohydrate digestion and absorption.
- Elucidates the mechanisms underlying monosaccharide transport and their dependence on sodium.
- Contributes to understanding nutrient absorption and potential therapeutic targets for malabsorption disorders.