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 occurs when the stomachâs normal electrical activity stops functioning correctly or when muscles don't respond to these electrical signals. This results in slowness in emptying the food into the small intestine with resultant symptoms. The most common causes for gastroparesis are: Diabetes.