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[Intestinal carbohydrate absorption--correlation between morphology and biochemistry (author's transl)]
Journal of Clinical Chemistry and Clinical Biochemistry. Zeitschrift Fur Klinische Chemie Und Klinische Biochemie
|March 1, 1978
Summary
Carbohydrate digestion involves amylase for starch and brush border enzymes for disaccharides. Monosaccharides are actively absorbed by enterocytes and then exit via facilitated diffusion into the bloodstream.
Area of Science:
- Gastroenterology
- Cell Biology
- Biochemistry
Context:
- Small intestinal mucosa morphology and function are crucial for nutrient absorption.
- Carbohydrate digestion and absorption are complex physiological processes.
- Understanding these processes is key to addressing malabsorption disorders.
Purpose:
- To detail the physiological mechanisms of carbohydrate digestion and absorption in the small intestine.
- To differentiate the transport systems for monosaccharides derived from starch versus disaccharides.
- To elucidate the pathways of monosaccharide entry into the bloodstream.
Summary:
- Starch hydrolysis occurs in the duodenal lumen via amylase.
- Disaccharide hydrolysis occurs at the enterocyte brush border membrane.
- Monosaccharides are actively absorbed into enterocytes and exit via facilitated diffusion, potentially entering fenestrated capillaries.
Impact:
- Provides a comprehensive overview of intestinal carbohydrate processing.
- Highlights distinct active transport mechanisms for different monosaccharide sources.
- Suggests a potential role for fenestrated capillaries in systemic monosaccharide circulation.