Duodenal Secretion and Digestion
نویسندگان
چکیده
منابع مشابه
Duodenal reflux during insulin-stimulated secretion.
Insulin-stimulated secretion has been studied in 67 subjects with intact vagi. The relationship between the changes in the concentrations of hydrogen and sodium ions in individual 10-minute samples showed a highly significant negative correlation. In quantitative terms, this correlation could be explained by the mixing of isotonic gastric juice and duodenal reflux but not by back-diffusion. In ...
متن کاملNeuropeptide S reduces duodenal bicarbonate secretion and ethanol-induced increases in duodenal motility in rats
Alcohol disrupts the intestinal mucosal barrier by inducing metabolic and functional changes in epithelial cells. Recently, we showed that neuropeptide S (NPS) decreases duodenal motility and increases mucosal paracellular permeability, suggesting a role of NPS in the pathogenesis of disorders and dysfunctions in the small intestine. The aim of the present study was to investigate the effects o...
متن کاملDuodenal inhibition of gastric secretion by osmotic agents in normal subjects and patients with duodenal ulcer.
Gastric secretion in man is inhibited by the presence in the duodenum of hyperosmolar and hypoosmolar solutions. Both acid and pepsin outputs are affected. There is no change in hydrogen, sodium, or potassium ion concentration in the gastric juice. Pepsin concentration, however, is reduced by all inhibitory stimuli. Inhibition is thought to act directly upon parietal and chief cells, and a poss...
متن کاملDuodenal mucosal protection by bicarbonate secretion and its mechanisms.
Proximal portion of duodenum is exposed to intermittent pulses of gastric H(+) discharged by the stomach. This review summarizes the mechanisms of duodenal mucosal integrity, mainly the role of mucus-alkaline secretion and the mucous barrier protecting surface epithelium against gastric H(+). The mucous barrier protects the leaky duodenal epithelium against each pulse of gastric H(+), which pen...
متن کاملNutritional regulation of gastric secretion, digestion and emptying.
CONTENTS INTRODUCTION . SECRETION . A C I D SECRETION: PHYSIOLOGICAL ASPECTS . A C I D S E C R E T I O N : N U T R I T I O N A L ASPECTS . The neonate . Meal p H . Distension and meal size . Particle size . . Meal size and frequency . Dietary proteins, peptides and amino acids . . Dietary carbohydrates . . Dietary fats . Beverages . Stimulatory eflects of whole foods. . BICARBONATE SECRETION . ...
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ژورنال
عنوان ژورنال: Scientific American
سال: 1893
ISSN: 0036-8733
DOI: 10.1038/scientificamerican07291893-14652bsupp