Vasopressin has three main effects: 1  Increasing the water permeability of distal convoluted tubule and collecting duct cells in the kidney, thus allowing water reabsorption and excretion of more concentrated urine, i.e., antidiuresis.
Some of the complications of gastroparesis include: 1  Food that stays in the stomach too long can ferment, which can lead to the growth of bacteria.  Food in the stomach can harden into a solid collection, called a bezoar. Bezoars can cause obstructions in the stomach that keep food from passing into the small intestine.
In fact, some doctors have suggested that stressful situations trigger the stomach to produce more stomach acid, which causes symptoms that resemble heartburn. Some of the key causes of nervous stomach are: 1  Stomach ulcers and acid reflux disease (GERD) and irritable bowel syndrome (IBS).2  Changes in digestive enzymes. 3  Food allergies and the intolerance of specific foods. 4  Eating foods that spicy, oily, high in fat, as well as fast foods.n fact, some doctors have suggested that stressful situations trigger the stomach to produce more stomach acid, which causes symptoms that resemble heartburn. Some of the key causes of nervous stomach are: 1  Stomach ulcers and acid reflux disease (GERD) and irritable bowel syndrome (IBS).