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.
If your pancreas were to stop working, you would become a type-1 diabetic due to your inability to regulate blood glucose levels. You would need to administer insulin injections when necessary as well as be put on multiple digestive enzyme pills in order to help your stomach break down the foods you eat.