Farmasevtika instituti farmakologiya va klinik farmatsiya kafedrasi


Gastric Factors That Promote Emptying Effect of Gastric Food Volume on Rate of



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Gastric Factors That Promote Emptying Effect of Gastric Food Volume on Rate of 
Emptying. 
Increased food volume in the stomach promotes increased emptying from the 
stomach. But this increased emptying does not occur for the reasons that one would expect 
Effect of 
the Hormone 
Gastrin 
on Stomach 
Emptying. 
In Chapter 64, we discuss how stomach wall stretch and the presence of certain types 
of foods in the stomach—particularly digestive products of meat—elicit release of the hormone 
gastrin 
from the antral mucosa. 
Inhibitory Effect of Enterogastric Nervous Reflexes 
from the Duodenum. 
When food enters the duodenum, multiple nervous reflexes are initiated 
from the duodenal wall.
Hormonal Feedback from the Duodenum Inhibits Gastric Emptying
—Role of Fats 
and the Hormone Cholecystokinin. 
Not only do nervous reflexes from the duodenum to the 
stomach inhibit stomach emptying, but hormones released from the upper intestine do so as well. The 
stimulus for releasing these inhibitory hormones is mainly fats entering the duodenum, although other 
types of foods can increase the hormones to a lesser degree. 
Other possible inhibitors of stomach emptying are the hormones 
secretin 
and 
gastric inhibitory 
peptide 
(GIP), also called 
glucose-dependent insulinotropic peptide. 
Secretin is released mainly from 
the duodenal mucosa in response to gastric acid passed from the stomach through the pylorus. GIP has 
a general but weak effect of decreasing gastrointestinal motility. In summary, hormones, especially 
CCK, can inhibit gastric emptying when excess quantities of chyme, especially acidic or fatty chyme, 
enter the duodenum f om the stomach.

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