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.
Gastroparesis is a stomach disorder in which the stomach doesn't empty properly, even when there is no blockage to the exit of the stomach.astroparesis is a complication of diabetes. It happens when the nerves that regulate how the gut moves food forward in the digestive process are damaged from being exposed to high blood sugar for many years. Consequently, the stomach does not empty out the way it normally would.