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.
It can be caused by damage to the vagus nerve, which regulates the digestive system. A damaged vagus nerve prevents the muscles in the stomach and intestine from functioning, preventing food from moving through the digestive system properly. Often, the cause of gastroparesis is unknown.
1 Gastroparesis is a disease of the muscles of the stomach or the nerves controlling the muscles that causes the muscles to stop working. 2  Gastroparesis results in inadequate grinding of food by the stomach, and poor emptying of food from the stomach into the intestine.astroparesis results in poor grinding of food in the stomach into small particles and slow emptying of food from the stomach into the small intestine.